Deck 7: HESI-A2-Physics

Question 1

An object is traveling in a circle in an arc length of 5 m. If the circle radius is 14 m, what is the object's angular displacement?

A)0)36
B)14 m
C)70
D)2)8

Answer 1

  0.36
Use the equation for angular displacement (Θ) to solve this equation.
Θ = S / r
Where:
S = 5 m and r = 14 m
Θ = 5 m / 14 m
Θ = 0.36
Note: Since the unit (m) is in both the numerator and denominator, they cancel out, and Θ is a unitless number.

Question 2

A cement block is pulled by a side handle with a force of 150 N. As the block slides, friction slows it with a force of 50 N. What is the magnitude of the net force acting on the block?

A)200 N
B)100 N
C)50 N
D)150 N

Answer 2

 
100 N
To determine the net force acting on an object, just add together all of the forces acting on the object. The two forces are the applied force and friction, and since they are working directly against each other, the net force (Fnet) can simply be expressed as:
Net force = Applied force + Friction force
Net force = 150 N + (-50 N)
Net force = 50 N
Remember that friction is working against the applied force (in the opposite direction), so it is a negative value.

Question 3

A box is sitting on a table. The mass of the box is 5.2 kg. The gravitational acceleration constant of Earth is approximately 10 m/s². What is the force that the table is exerting on the box to keep the box from accelerating towards the ground?

A)5)2 N upward
B)5)2 N downward
C)52 N upward
D)52 N downward

Answer 3

 52 N upward
The formula to find the required force is force = mass in kg × acceleration in m/s².
F=ma
F = 5.2 kg x 10 m/s2
F = 52 N
The box experiences a force of 52 N from gravity and this force is down. Because of Newton's Third Law (The mutual forces of action and reaction between two bodies are equal, opposite and collinear), the table is pushing the box back up with the same force of 52 N upward. This is why the box does not crash to the floor. If the box was heavier and the table was not able to push upwards with the force required, the table would break and the box would crash to the floor.

Question 4

A ball is thrown downward with a force of 34 N. The Force of gravity acting on the ball is an additional 10 N. What is the net force on the ball?

A)44 N up
B)44 N down
C)24 N up
D)24 N down

Question 5

A bowling ball and pin collide. The ball hits the pin and experiences a force of 20 N. What is the force on the bowling pin during the collision?

A)20 N
B)10 N
C)0 N
D)-20 N

Question 6

A ball is kicked off the edge of a roof that is 34 meters tall. The horizontal speed given to the ball is 12.5 m/s. If there is no air resistance, how far out from the base of the building will the ball land?

A)32.86 m
B)28.44 m
C)19.35 m
D)30.80 m

Question 7

Acceleration due to Earth's gravity is -9.8 m/s². Which part of this number gives the information on direction, making it a vector quantity?

A)We know it is a vector quantity because the seconds are squared in the units.
B)We know it is a vector quantity because the negative sign tells us the magnitude of the acceleration.
C)We know it is a vector quantity because the negative sign tells us the acceleration is upward.
D)We know it is a vector quantity because the negative sign tells us the acceleration is downward.

Question 8

An object travels at a velocity of -54 m/s for 11 seconds. What is its speed?

A)-4.9 m/s²
B)4)9 m/s
C)54 m/s
D)54 m/s²

Question 9

A ball is set in motion down a constant slope. At a certain point in its descent, the ball is rolling at 16 m/s and accelerates to 32 m/s in 8 seconds. How fast is the acceleration?

A)2 m/s
B)-2 m/s
C)2 m/s²
D)-2 m/s²

Question 10

When a small object is released from the top of a skyscraper, it takes the object 9 secs to hit the ground. Given this information, what can you say about the height of the skyscraper?

A)289.5 m
B)365.9 m
C)396.9 m
D)245.5 m

Question 11

A 100 g tennis ball attached to a string is rotated about a 3 meter radius. If the ball's velocity is approximately 9 m/s, how much force is being generated?

A)3)0 N
B)0)9 N
C)2)7 N
D)3)9 N

Question 12

A person has a mass of 76 kg. What is this person's weight on Earth?

A)690 N
B)820 N
C)455 N
D)745 N

Question 13

Jessica pushes a box 10 m across the floor. The box has a mass of 20 kg and she uses 30 N of force on the box. How much work did she do on the box?

A)200 Nxm
B)600 Nxm
C)0 Nxm
D)300 Nxm

Question 14

A 2 kg dog runs southwest at a velocity of 1.5 m/s. What is its momentum?

A)2)5 kg m/s southwest
B)3)0 kg m/s southwest
C)4)5 kg m/s southwest
D)2 kg m/s southwest

Question 15

A 900-kg car is traveling at 15 m/s. The driver of the car brakes and the speed is reduced to 5 m/s. What is the car's change in momentum?

A)9000 kg m/s
B)90 kg m/s
C)-9000 kg m/s
D)-90 kg m/s

Question 16

If a wave in a string travels at 52 m/s and has a wavelength of 0.65 m, what is the frequency?

A)0)0125 Hz
B)80 Hz
C)12.5 Hz
D)65 Hz

Question 17

Mother dolphins whistle to their calves. This whistle works as a signature to help the calf identify its mother. If a mother dolphin whistles to its calf with a frequency of 15 kHz and a wavelength of 10 cm. What would be the speed of the sound wave of this whistle?

A)1500 m/s
B)1700 m/s
C)1750 m/s
D)1800 m/s

Question 18

In which of the following medium can only electromagnetic waves can travel through?

A)Space
B)Water
C)Air
D)Steel

Question 19

Chloroform has an index of refraction of 1.44. What is the speed of light in this medium?

A)2)08 x 10⁸ m/s
B)2)27 x 10⁸ m/s
C)4)6 x 10⁸ m/s
D)3)08 x 10⁸ m/s

Question 20

Which of the following describes a concave lens?

A)It is thicker in the middle than the sides
B)It is a converging lens
C)It is a diverging lens
D)The images formed are larger

Question 21

What is the image height of a 6 cm tall box that is placed 1.5 cm away from a convex mirror that has an image distance of 4.5 cm?

A)-2 cm
B)-9 cm
C)-6 cm
D)-18 cm

Question 22

What kind of a force do charged objects exert on one another when their charges are similar (either both negative or positive). 

A)Attractive
B)Gravitational
C)Repulsive
D)Nuclear

Question 23

Object 1 has a charge of 25 μC and is placed 35 cm from Object 2 that has a charge of 40 μC. What is the magnitude of the resulting force between the two objects?

A)73.47 N
B)60.18 N
C)55.01 N
D)53.88 N

Question 24

A circuit has a current of 4 amperes and a voltage of 220 V. What is the circuit's resistance?

A)55 Ohms
B)0)5 Ohms
C)1100 Ohms
D)11 Ohms

Question 25

A 2.4 Volt beard trimmer has a 12 Ohm resistance. What current flows through the trimmer?

A)0)02 A
B)0)2 A
C)2 A
D)20 A

Question 26

A ball attached to a pole by a rope swings around in a circular path for 4.5 m. If the distance from the pole to the ball at the end of the rope is 3.5 m, what is the angular displacement of the ball?

A)15.8
B)1)3
C)0)78
D)4)5

Question 27

A desk is being pushed to the other side of the room with a force of 640 N, while friction is acting against the legs of the desk with a force of 200 N. What is the net force acting upon the desk?

A)840 N
B)640 N
C)200 N
D)440 N

Question 28

A bowling ball hits a bowling pin. The ball has a mass of 5.3 kg and accelerates at a rate of 2 m/s2 backward. What is the force on the bowling ball?

A)5)3 N backward
B)5)3 N forward
C)10.6 N backward
D)10.6 N forward

Question 29

Three hockey pucks collide on the ice. Hockey puck A hits hockey puck B with a force of 9N to the right. Hockey puck B hits hockey puck C at the same moment and in the same direction with a force of 4 N. What is the resultant force on hockey puck C?

A)4 N to the right
B)5 N to the left
C)9 N to the left
D)13 N to the right

Question 30

Which law is best described by the equation F= ka (where F is force measured in N, a is acceleration in m/s², and k is the proportionality constant in kg)

A)Newton's First Law
B)Newton's Second Law
C)Newton's Third Law
D)Newton's Third Law

Question 31

Which of the following is a scalar quantity?

A)10 steps up
B)10 miles north
C)10 paces
D)10 yards to the right

Question 32

A track team is warming up. They jog around the track (1/4 mile) three times and finish exactly where they started. Which of the following statements it true?

A)Their displacement is ¾ mile and their distance traveled is also ¾ mile.
B)Their displacement is ¾ mile and their distance traveled is 0 miles.
C)Their displacement is 0 miles and their distance traveled is ¾ mile.
D)Their displacement is 0 mile and their distance traveled is also 0 mile.

Question 33

A New Caledonian Crow releases a nut from a height to collect the meat once it breaks. If it takes the nut 4 secs to hit the ground, what was the height of the crow when she released the nut?

A)88 m
B)69 m
C)96 m
D)78 m

Question 34

Carlos walks to school everyday. It talks his 15 minutes in the morning and 10 minutes after school. If his school is 1 mile away. What is his average speed in the morning and the afternoon?

A)4 mph in the morning and 6 mph in the afternoon
B)6 mph in the morning and 4 mph in the afternoon
C)1/4 mph in the morning and 1/6 mph in the afternoon
D)1/6 mph in the morning and 1/4 mph in the afternoon

Question 35

Rihanna's car accelerated from 0 m/s² to 60 m/s in 2.5 seconds. What was the acceleration of the car?

A)24 m/s²
B)25 m/s²
C)-26 m/s²
D)0 m/s²

Question 36

A car of 900 kg mass is driven around a circular race track of 600 m radius at a constant velocity of 220 km/h. What is the centripetal force acting on the car?

A)91. 67 N
B)85.75 N
C)69. 82 N
D)70.54 N

Question 37

The gravitational acceleration constant for the moon is -1.62 m/s². If a person has a mass of 76 kg on earth, what is their weight on the moon?

A)76 N
B)7)75 N
C)12.55 N
D)123 N

Question 38

James pulls a rope and he has a mass of 77 kg. He pulls 20 m of the rope and does 40 N×m of work on the rope. What was the force he put on the rope to pull it up?

A)1540 N
B)2 N
C)½ N
D)4620 N

Question 39

A 45 kg bowling ball rolling at 0.75 m/s strikes a stationary 2.5 kg bowling pin and knocks it back with a velocity of 1.5 m/s. How fast will the bowling ball be moving?

A)0)67 m/s
B)67 m/s
C)6)7 m/s
D)0)67 kg m/s

Question 40

If a spring is being stretched 150 cm with a force of 20 N, how far will it stretch if the force is increased to 7 N?

A)14 cm
B)38 cm
C)52 cm
D)71 cm

Question 41

A wave travels 36 m/s and has a wavelength of 5.3 m. What would be the frequency of the wave?

A)4)37 Hz
B)6)79 Hz
C)0)15 Hz
D)0)83 Hz

Question 42

Which one of the following terms is known as the distance between two consecutive highest points or lowest points of a wave?

A)speed
B)wavelength
C)amplitude
D)frequency

Question 43

If a particular substance has a refractive index of 2.25, how fast does light travel through it?

A)5)33 x 10⁸ m/s
B)1)33 x 10⁸ m/s
C)1)78 x 10⁸ m/s
D)1)23 x 10⁸ m/s

Question 44

Which of the following types of lenses magnifies an object?

A)Convex
B)Concave
C)Diverging
D)Reflective

Question 45

What is the speed of light through a medium with an index of refraction of 1.06?

A)2)83 x 10⁸ m/s
B)1)5 x 10⁸ m/s
C)6)76 x 10⁸ m/s
D)1)83 x 10⁸ m/s

Question 46

A 4.5 m tall object is placed 1.4 m away from a convex mirror and has an image height of 3.5 m. What is the image distance?

A)-1.09 m
B)1)09 m
C)-0.54 m
D)-1.79 m

Question 47

What would be the magnitude of resulting force between an object of charge 45μC and another object of charge 30μC that are placed 60 cm apart?

A)41.40 N
B)38.65 N
C)35.41 N
D)33.75 N

Question 48

What would be the magnitude and direction of a force that is acting on a charge of - 35 μC if an electric field of magnitude 150,000 N/C points due West at a certain spot?

A)5)25 N to the East
B)52.5 N to the East
C)52.5 N to the West
D)5)25 N to the West

Question 49

A circuit has a current of 0.5 amperes and a voltage of 120 V. What is the circuit's resistance?

A)6 Ohms
B)60 Ohms
C)2400 Ohms
D)240 Ohms

Question 50

A circuit has a resistance of 30 ohms and a current of 4 amperes. What is the circuit's voltage?

A)7)5 V
B)12 V
C)75 V
D)120 V

Question 51

A car drives in a circle in a radius of 145 m and travels 678 m. What is the angular displacement of the car?

A)98,310
B)0)21
C)678
D)4)7

Question 52

When an object is moved across a floor with a 95 N force, friction acts against the movement with a force of 15 N. What is the net force on the object?

A)105 N
B)80 N
C)95 N
D)100 N

Question 53

A car that has a mass of 800 kg slows down. The brakes exert a force of -2780 N. What is the acceleration of the car?

A)2)7 m/s²
B)-2.7 m/s²
C)3)5 m/s²
D)-3.5 m/s²

Question 54

Three hockey pucks collide on the ice. Hockey puck A hits hockey puck B with a force of 9N to the right. Hockey puck B hits hockey puck C at the same moment and in the same direction with a force of 4 N, not including the force from puck A. What is the resulting force on hockey puck A?

A)4 N to the left
B)5 N to the right
C)9 N to the left
D)13 N to the right

Question 55

The equation for force, given by Newton's Second Law, is F=ma. M (mass) is measured in kilograms and acceleration is measured in m/s². What is force measured in?

A)Coulombs
B)Meters/kilogram
C)Naughts
D)Newtons

Question 56

A man jumps out of an airplane with a parachute. When he opens his parachute, he is plummeting to the ground at a rate of 100 mph. When he touches the ground 5 minutes later, he lands at a comfortable 10mph. What is his average acceleration during this time?

A)18 miles/hour
B)-18 miles/hour
C)1080 miles/hour
D)-1080 miles/hour

Question 57

Chester walked from his house to his friend's house which is 140 meters from his house to the right. They decide to go to a café for lunch which is down the street, left of Chester's house 50 meters. They walk to the café together and pass by Chester's house. Which of the following statements is true when they are at the café?

A)Chester's distance traveled and his displacement are both greater than his friend's respective quantities.
B)Chester's distance traveled is less than his friend's distance traveled but his displacement is greater than his friend's. displacement
C)Chester's distance traveled is greater than his friend's distance traveled but his displacement is less than his friend's displacement.
D)Chester's distance traveled and his displacement are both less than his friend's respective quantities.

Question 58

Sahil went to the grocery store. He was gone for a total of 28 minutes and spent 13 minutes in the store. The store is 3 miles away from his house. What is his average speed while driving (not including the time in the store)?

A)15 mph
B)24 mph
C)20 mph
D)32 mph

Question 59

A cyclist is riding a path in a park that is a distance of 23 miles. He takes an hour and 15 minutes to complete the path and finishes the circuit to finish where he started. What value would you find to find his pace?

A)average speed
B)average velocity
C)average acceleration
D)average displacement

Question 60

There are two buildings with the same length on Earth and Bizarro World. A brick is released from the top of each building. On Earth, the brick reaches the ground in 5 secs while on Bizarro World it takes 7 secs. What can you say about the gravity on Bizarro World?

A)4)8 m/s²
B)5)0 m/s²
C)5)2 m/s²
D)5)4 m/s²

Question 61

A car of 900 kg mass is driven around a circular race track of 600 m radius at a constant velocity of 220 km/h. What is the centripetal acceleration of the car?

A)1)15 m/s²
B)9)81 m/s²
C)4)98 m/s²
D)6)22 m/s²

Question 62

A person jumps in the air. When they reach their peak height, they are 0.65m off of the ground. The person as a mass of 83 kg. What is their gravitational potential energy?

A)515 J
B)530 J
C)545 J
D)560 J

Question 63

An ice skater, who has a mass of 70 kg has 1500 J of Kinetic Energy. What is the velocity of the skater?

A)42.85 m/s
B)6)54 m/s
C)13.09 m/s
D)171.38 m/s

Question 64

A 0.25 kg phone drops off a table and falls with a velocity of 0.55 m/s and strikes a 0.75 kg book and bounces back with a velocity of 0.1 m/s. What is the velocity of the book after the phone strikes it?

A)15 m/s
B)1)5 m/s
C)12.5 m/s
D)0)15 m/s

Question 65

A block is suspended from a spring, causing it to displace 1.25m from equilibrium. The spring constant is 12 N / m. What is the mass of the block?

A)1)21 kg
B)1)53 kg
C)3)62 kg
D)4)75 kg

Question 66

Experiments have shown that the maximum wavelength of a sound wave that a healthy person can hear is 17 meters. What would be the frequency of this sound? (The speed of sound is 340 m/s)

A)0)05 Hz
B)0)34 Hz
C)20 Hz
D)25 Hz

Question 67

If a patient breathes 720 times in 60 minutes, what is the breathing period of this patient in seconds?

A)12 s
B)0)083 s
C)5 s
D)8)3 s

Question 68

Which one of the following is the definition of Amplitude?

A)Measurement of time per a single wave to be created
B)Highest point of a transverse wave
C)The maximum displacement of the wave from equilibrium
D)The number of waves created per second

Question 69

Which of the following describes convex lenses?

A)They are thicker at the sides
B)The are a diverging lens
C)They are a converging lens
D)They do not refract light

Question 70

If an object is magnified by a factor of 2 in a convex lens and has an image height of 4.5 cm, what is the height of the object?

A)2)25 cm
B)9)0 cm
C)0)44 cm
D)45 cm

Question 71

What would be the magnitude of the resulting force between an object of charge 75μC and another object of charge 50 μC that are placed 4 m apart?

A)1)40 N
B)1)69 N
C)3)14 N
D)3)75 N

Question 72

A LED light bulb with 120 Ohm resistance is powered by a 220 Volt power source. What is the current being drawn?

A)0)55 A
B)1)83 A
C)5)5 A
D)18.3 A

Question 73

How many amperes does a 220 Volt hair drier draw when it delivers 2200 Watts of power?

A)0)1 A
B)1 A
C)10 A
D)100 A

Question 74

Which of the following is the term that describes how much magnetic field is flowing through a specified area?

A)Magnetic Flax
B)Electromagnetism
C)Electrolysis
D)Magnetic Flux

Question 75

A bicycle's wheels are moving at a speed of 0.78 revolutions per second. The cyclist sees a log in the road and brakes, slowing the bicycle to 0.05 revolutions per second over 4 seconds. What is the angular acceleration of the bicycle wheel?

A)0)18 rev/s²
B)-0.18 rev/s²
C)2)9 rev/s²
D)-2.9 rev/s²

Question 76

A motorcyclist accelerates his bike over a period of 3 seconds, and the motorcycle wheel increases from 23 revolutions per minute to 34 revolutions per minute. What is the angular acceleration of the wheel?

A)3)7 rev/s²
B)102 rev/s²
C)33 rev/s²
D)-3.7 rev/s²

Question 77

Three hockey pucks collide on the ice. Hockey puck A hits hockey puck B with a force of 9N to the right. Hockey puck B hits hockey puck C at the same moment and in the same direction with a force of 4 N, not including the force from puck A. What is the resultant force on hockey puck B?

A)4 N to the left
B)5 N to the right
C)9 N to the left
D)13 N to the right

Question 78

Which of the following is the correct equation for Newton's 2nd Law of Motion?

A)F = a/m
B)F = m/a
C)F = ma
D)F = 1/(ma)

Question 79

A bullet is fired off a cliff that is 44.1 meters tall. The horizontal speed of the bullet is 700 m/s. Assuming no air resistance, how far from the base of the cliff will the bullet land?

A)2000 m
B)1750 m
C)2100 m
D)2450 m

Question 80

A car comes to a gentle stop at a stoplight. The car was traveling at 35 mph and comes to a full stop in 45 seconds. What is the acceleration during this time in mph/minute?

A)-0.7778 mph/minute
B)0)7778 mph/minute
C)-0.013 mph/minute
D)0)013 mph/minute