Looking for Quiz 2 :
Kinematics: Description of Motion
Question Type
All
A hospital patient is given 500 cc of saline by IV. If the saline is received at a rate of 4.0 mL/min, how long will it take for the half liter to run out
Free
Essay
Answer:
Answer:
Write the expression for the total volume of the saline.
The time it takes for the saline to be finished is equal to the total volume of the saline divided by the rate of its injection,
Here
is the rate of injection of the saline.
Substitute
for
and
for
,
Therefore, it takes about two hours for the half liter saline to run out.
Choose question tag
A scalar quantity has (a) only magnitude, (b) only direction, (c) both magnitude and dirrection.
Free
Short Answer
Answer:
Answer:
A physical quantity which have only magnitude is called as scalar quantity and have both magnitude and direction is known as vector quantity. Here, magnitude is defined as the size or quantity, whereas the direction is referred as a vector, which is directed from one place to another.
A vector has both magnitude and direction, the then option (c) is incorrect.
A scalar quantity has only magnitude but no specified direction. Hence, the option (b) is also incorrect.
Therefore, the correct answer is
.
Choose question tag
If the displacement of an object is 300 m north, what can you say about the distance traveled by the object
Free
Essay
Answer:
Answer:
Distance traveled by an object is the change in its position whereas displacement is shortest path traced by the object.
Measuring the shortest path is the displacement, so its magnitude will always be equal to or smaller than the distance.
If the displacement of the object is 300 m north, then the distance of the object may be greater or equal to the displacement.
Suppose, if the object traces a straight line path towards north, then the distance will also be 300 m. But, if the same object moves in different paths and finally reaches north, then the distance of the object will be greater than the displacement.
Choose question tag
A senior citizen walks 0.30 km in 10 min, going around a shopping mall. (a) What is her average speed in meters per second (b) If she wants to increase her average speed by 20% when walking a second lap, what would her travel time in minutes have to be
Essay
Answer:
Choose question tag
A motorist travels 80 km at 100 km/h, and 50 km at 75 km/h. What is the average speed for the trip
Essay
Answer:
Choose question tag
What is the magnitude of the displacement of a car that travels half a lap along a circle that has a radius of 150 m How about when the car travels a full lap
Essay
Answer:
Choose question tag
Distance is to displacement as (a) centimeters is to meters, (b) a vector is to a scalar, (c) speed is to velocity, (d) distance is to time.
Short Answer
Answer:
Choose question tag
A vector quantity has (a) only magnitude, (b) only direction, (c) both direction and magnitude.
Short Answer
Answer:
Choose question tag
Does a fast-moving object always have higher acceleration than a slower object Give a few examples, and explain.
Essay
Answer:
Choose question tag
A car is traveling at a constant speed of 60 mi/h on a circular track. Is the car accelerating Explain.
Essay
Answer:
Choose question tag
The average velocity of a jogger on a straight track is computed to be +5 km/h. Is it possible for the jogger's instantaneous velocity to be negative at any time during the jog Explain.
Essay
Answer:
Choose question tag
Can the displacement of a person's trip be zero, yet the distance involved in the trip be nonzero How about the reverse situation Explain.
Essay
Answer:
Choose question tag
Speed is the magnitude of velocity. Is average speed the magnitude of average velocity Explain.
Essay
Answer:
Choose question tag
What can be said about average speed relative to the magnitude of the average velocity (a) greater than, (b)equal to, (c) both a and b.
Short Answer
Answer:
Choose question tag
A hospital nurse walks 25 m to a patient's room at the end of the hall in 0.50 min. She talks with the patient for 4.0 min, and then walks back to the nursing station at the same rate she came. What was the nurse's average speed
Essay
Answer:
Choose question tag
Which of the following is always true about the magnitude of the displacement: (a) It is greater than the distance traveled; (b) it is equal to the distance traveled; (c) it is less than the distance traveled; or (d) it is less than or equal to the distance traveled
Short Answer
Answer:
Choose question tag
You are told that a person has walked 750 m. What can you safely say about the person's final position relative to the starting point
Essay
Answer:
Choose question tag
A train makes a round trip on a straight, level track. Tire first half of the trip is 300 km and is traveled at a speed of 75 km/h. After a 0.50 h layover, the train returns the 300 km at a speed of 85 km/h. What is the train's average speed and (b) average velocity
Essay
Answer:
Choose question tag
On a position-versus-time plot for an object that has a constant acceleration, the graph is (a) a horizontal line, (b) a nonhorizontal and nonvertical straight line, (c) a vertical line, (d) a curve.
Short Answer
Answer:
Choose question tag
An Olympic sprinter can run 100 yd in 9.0 s. At the same rate, how long would it take tire sprinter to run 100 m
Essay
Answer:
Choose question tag
Contact Us
© 2020-2022 Quizplus LLC. All Rights Reserved