Question 1

Suppose Sammy Sosa hits a home run which travels 361. ft (110. m). Leaving the bat at 50 degrees above the horizontal, how high did it travel?

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Question 2

A marble moving 1.48 m/s rolls off the top edge of a 125. cm high table.
(a) How far from the base of the table did it strike the floor? 
(b) How long was it "in flight"?

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Question 3

A hunter points a rifle horizontally 3.30 m above the ground. The bullet leaves the barrel at 325. m/s.
(a) How long did it take for the bullet to strike the ground?
(b) How far horizontally did it travel?

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Question 4

A girl throws a rock horizontally with a speed of 12.0 m/s from a bridge. It falls 2.28 s before reaching the water below.
(a) How high is the bridge from the water below?
(b) How far horizontally does the rock travel before striking the water?

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Question 5

Misty throws a stone horizontally from the roof edge of a 50. meter high dormitory. It hits the ground at a point 60. m from the building.
(a) Determine the horizontal component of velocity just before hitting the ground. 
(b) What vertical speed did it have just before hitting the ground?

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Question 6

Daisy throws a rock horizontally with a speed of 12.0 m/s from a bridge. It falls 2.28 s before reaching the water below.
(a) When the rock hits the water it is traveling with what horizontal component of velocity? 
(b) What was the total speed just before hitting the water?

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The answer of Daisy throws a rock horizontally with a...

Question 7

How high does a bullet travel after leaving the barrel of a rifle at 225. m/s with
an angle of 66.° above the horizontal? Also what is its range (ignore air friction)?

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Question 8

A bullet left the muzzle of a gun at 150. m/s and attains a height of 0.57 km. Initially the velocity was angled how many degrees above the horizontal?

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Question 9

In attempting to jump up a waterfall, a salmon leaves the water 2.0 m from the base of the waterfall. With what minimum speed must it leave the water in order just to make it up a waterfall 1.6 m high?

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Question 10

A child drops a toy at rest from a point 4.0 m above the ground at the same instant her friend throws a ball upward at 6 m/s from a point 1.0 m above the ground. At what distance above the ground do the ball and the toy cross paths?

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Question 11

A car and a truck are traveling in the same direction along a straight section of highway. The car is moving at 55. mph and the truck is moving 45. mph. What is the velocity of the truck relative to the car?

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Question 12

A car and a truck are traveling in the same direction along a straight section of highway. The car is moving at 55. mph and the truck is moving 45. mph. What is the velocity of the car relative to the truck?

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Question 13

An airplane with an airspeed of 120. km/h is headed 30.0° East of North in a wind blowing due West at 30. km/h. What is the groundspeed of the plane?

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Question 14

Billy swims to a point straight across a 100. m wide river that flows at 1.2 m/s. How long does it take him to swim to the other side?

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Question 15

Holly intends to swim to a point straight across a 100. m wide river that flows at 1.2 m/s. If she can swim 2.5 m/s in still water, at what angle must she swim upstream to achieve her goal?

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Question 16

A pickup truck moves 25. m/s Eastward. Jerry is standing in the back and throws a baseball in what to him is the Southwest direction at 28. m/s (with respect to the truck). A person at rest would see the ball moving HOW FAST in WHAT DIRECTION?

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Question 17

An airplane is pointed in the NE direction and is moving 71. m/s with respect to the air. The jetstream (moving air) carries the plane 30. m/s toward the East. What is the velocity of the plane relative to the ground?

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Question 18

The driver of a motorboat that can move at 10 m/s wishes to travel directly across a narrow strait in which the current flows at 5 m/s.
(a) At what angle upstream should the driver head the boat? 
(b) How long will it take to cross a distance of 1.6 km?

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Question 19

A boat has a velocity 12. km/hr Southward and 16. km/hr Westward. What is its speed and how long does it take to travel 94. km?

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Question 20

A 960. m wide river flows at 16. m/s as shown in Figure 3-8. Alice and John have a race in identical boats which travel 20. m/s in still water. Alice leaves point A and steers so that she goes straight to point B directly across and then back to A. John steers up to point C (960. m upstream) and then returns to A. Figure 3-8
  
(a) Which person arrived back at A first?
(b) How much sooner did the winner arrive back at A?

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Quiz 3: Motion in Two Dimensions

Suppose Sammy Sosa hits a home run which travels 361. ft (110. m). Leaving the bat at 50 degrees above the horizontal, how high did it travel?

A marble moving 1.48 m/s rolls off the top edge of a 125. cm high table. (a) How far from the base of the table did it strike the floor? (b) How long was it "in flight"?

A hunter points a rifle horizontally 3.30 m above the ground. The bullet leaves the barrel at 325. m/s. (a) How long did it take for the bullet to strike the ground? (b) How far horizontally did it travel?

A girl throws a rock horizontally with a speed of 12.0 m/s from a bridge. It falls 2.28 s before reaching the water below. (a) How high is the bridge from the water below? (b) How far horizontally does the rock travel before striking the water?

Misty throws a stone horizontally from the roof edge of a 50. meter high dormitory. It hits the ground at a point 60. m from the building. (a) Determine the horizontal component of velocity just before hitting the ground. (b) What vertical speed did it have just before hitting the ground?

Daisy throws a rock horizontally with a speed of 12.0 m/s from a bridge. It falls 2.28 s before reaching the water below. (a) When the rock hits the water it is traveling with what horizontal component of velocity? (b) What was the total speed just before hitting the water?

How high does a bullet travel after leaving the barrel of a rifle at 225. m/s with an angle of 66.° above the horizontal? Also what is its range (ignore air friction)?