PHYS 1114 CH 3

A large rock is dropped from the top of a high cliff. Assuming that air resistance can be ignored and that the acceleration has the constant value of 10 m/2^s, how fast would the rock be traveling 1 seconds after it was dropped? Give your answer in m/s.

10

A ball is thrown downward with an initial velocity of 7 m/s. Using the approximate value of g = 10 m/s^2, what is the speed of the ball 4 seconds after it is released? Give your answer in m/s.

47

A ball rolls off a shelf with a horizontal velocity of 5 m/s. If it takes 1 second for the ball to reach the floor, how high above the floor is the tabletop? Give your answer in meters.

5

A ball is dropped from a building. Using the approximate value of g = 10 m/s^2, find the change in speed during the first second after the ball was dropped and 6 seconds after the ball was dropped. Give your answer in m/s.

50

A ball rolls off a shelf with a horizontal velocity of 6 m/s. At what horizontal distance from the shelf does the ball land if it takes 1 second to reach the floor? Give your answer in meters.

6

A ball rolls off a table with a horizontal velocity of 5 m/s. If it takes 1 second for the ball to reach the floor. a. What is the vertical component of the ball's velocity just before it hits the floor? (Make sure your answer has the correct sign.) b. What is the horizontal component of the ball's velocity just before it hits the floor? Assume g = 10 m/s^2. Give your answers is m/s.

a) -10 b) 5

A ball rolls off a platform that is 5 meters above the ground. The ball's horizontal velocity as it leaves the platform is 6 m/s. a. How much time does it take for the ball to hit the ground? Give your answer in seconds. b. How far from the base of the platform does the ball hit the ground? Give your answer in meters. Assume that g = 10 m/s^2.

a) 1 b) 6

A projectile is fired at an angle such that the vertical component of its velocity and the horizontal component of its velocity are both equal to 30 m/s. a. Assuming g = 10 m/s^2, how long does it take for the ball to reach its high point? Give your answer in seconds. b. What horizontal distance does the ball travel in this time? Give your answer in meters.

a) 3 b) 90

Suppose that the gravitational acceleration on a certain planet is only 4 m/s^2. A space explorer standing on this planet throws a ball straight upward with an initial velocity of 20 m/s. a. What is the velocity of the ball 4 seconds after it is thrown? Give your answer in m/s. b. How much time elapses before the ball reaches the high point in its flight? Give your answer in seconds.

a) 4 *must subtract when coming down b) 5

A steel ball is dropped from a diving platform (with an initial velocity of zero). a. Through what distance does the ball fall in the first 1 second? (Assume g = 10 m/s^2) b. How far does it fall in the first 2 seconds?

a) 5 b) 20