A tennis ball is shot vertically upward in an evacuated chamber inside a tower with an initial speed of 20.0 m/s at time t=0 s. 8. How high does the ball rise? Ans: 20.4 m 9. Approximately how long does it take the tennis ball to reach its maximum height? Ans: 2.04 s 10. Determine the velocity of the ball at t = 3.00 seconds. Ans: 9.40 m/s, downward 11. What is the magnitude of the acceleration of the ball when it is at its highest point? Ans: 9.80 m/s²

College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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A tennis ball is shot vertically upward in an evacuated chamber inside a tower with an initial speed of
20.0 m/s at time t=0 s.
8. How high does the ball rise?
Ans: 20.4 m
9. Approximately how long does it take the tennis ball to reach its maximum height?
Ans: 2.04 s
10. Determine the velocity of the ball at t = 3.00 seconds.
Ans: 9.40 m/s, downward
11. What is the magnitude of the acceleration of the ball when it is at its highest point?
Ans: 9.80 m/s²
Use the following to answer questions 12-15.
A rock, dropped from rest near the surface of an atmosphere-free planet, attains a speed of 20.0 m/s
after falling 8.0 meters.
12. What is the magnitude of the acceleration due to gravity on the surface of this planet?
Ans: 25 m/s²
13. How long did it take the object to fall the 8.0 meters mentioned?
Ans: 0.80 s
14. How long would it take the object, falling from rest, to fall 16 m on this planet?
Ans: 1.1 s
15. Determine the speed of the object after falling from rest through 16 m on this planet.
Ans: 28 m/s
16. At time t=0 s, a puck is sliding on a horizontal table with a velocity 3.60 m/s, 35.0° above the +x axis. As
the puck slides, a constant acceleration acts on it that has the following components: ax = -0.360 m/s² and
ay = -0.980 m/s². What is the velocity of the puck at time t = 1.50 s?
Ans: 2.48 m/s, 13.9° above the +x axis
Transcribed Image Text:A tennis ball is shot vertically upward in an evacuated chamber inside a tower with an initial speed of 20.0 m/s at time t=0 s. 8. How high does the ball rise? Ans: 20.4 m 9. Approximately how long does it take the tennis ball to reach its maximum height? Ans: 2.04 s 10. Determine the velocity of the ball at t = 3.00 seconds. Ans: 9.40 m/s, downward 11. What is the magnitude of the acceleration of the ball when it is at its highest point? Ans: 9.80 m/s² Use the following to answer questions 12-15. A rock, dropped from rest near the surface of an atmosphere-free planet, attains a speed of 20.0 m/s after falling 8.0 meters. 12. What is the magnitude of the acceleration due to gravity on the surface of this planet? Ans: 25 m/s² 13. How long did it take the object to fall the 8.0 meters mentioned? Ans: 0.80 s 14. How long would it take the object, falling from rest, to fall 16 m on this planet? Ans: 1.1 s 15. Determine the speed of the object after falling from rest through 16 m on this planet. Ans: 28 m/s 16. At time t=0 s, a puck is sliding on a horizontal table with a velocity 3.60 m/s, 35.0° above the +x axis. As the puck slides, a constant acceleration acts on it that has the following components: ax = -0.360 m/s² and ay = -0.980 m/s². What is the velocity of the puck at time t = 1.50 s? Ans: 2.48 m/s, 13.9° above the +x axis
1. A landing airplane makes contact with the runway with a speed of 75.0 m/s and moves toward the south.
After 18.5 seconds, the airplane comes to rest. What is the average acceleration of the airplane during the
landing?
Ans: 4.05 m/s², north
2. A pitcher delivers a fast ball with a velocity of 43 m/s to the south. The batter hits the ball and gives it a
velocity of 51 m/s to the north. What was the average acceleration of the ball during the 1.0 ms when it
was in contact with the bat?
Ans: 9.4 * 10¹ m/s², north
3. A train with a constant velocity of +28.6 m/s approaches a small town. The operator applies the brake,
reducing the train's velocity to +11.4 m/s. If the average acceleration of the train during braking is −1.35
m/s², for what elapsed time does the operator apply the brake?
Ans: 12.7 s
4. A cheetah is walking at a speed of 1.15 m/s when it observes a gazelle 43.0 m directly ahead. If the cheetah
accelerates at 9.25 m/s², how long does it take the cheetah to reach the gazelle if the gazelle doesn't move?
Ans: 2.93 s
Use the following to answer questions 5-7.
A ball is shot straight up from the surface of the earth with an initial speed of 19.6 m/s.
Neglect any effects due to air resistance.
5. What is the magnitude of the ball's displacement from the starting point after 1.00 second has elapsed?
Ans: 14.7 m
6. What maximum height will the ball reach?
Ans: 19.6 m
7. How much time elapses between the throwing of the ball and its return to the original launch point?
Ans: 4.00 s
Transcribed Image Text:1. A landing airplane makes contact with the runway with a speed of 75.0 m/s and moves toward the south. After 18.5 seconds, the airplane comes to rest. What is the average acceleration of the airplane during the landing? Ans: 4.05 m/s², north 2. A pitcher delivers a fast ball with a velocity of 43 m/s to the south. The batter hits the ball and gives it a velocity of 51 m/s to the north. What was the average acceleration of the ball during the 1.0 ms when it was in contact with the bat? Ans: 9.4 * 10¹ m/s², north 3. A train with a constant velocity of +28.6 m/s approaches a small town. The operator applies the brake, reducing the train's velocity to +11.4 m/s. If the average acceleration of the train during braking is −1.35 m/s², for what elapsed time does the operator apply the brake? Ans: 12.7 s 4. A cheetah is walking at a speed of 1.15 m/s when it observes a gazelle 43.0 m directly ahead. If the cheetah accelerates at 9.25 m/s², how long does it take the cheetah to reach the gazelle if the gazelle doesn't move? Ans: 2.93 s Use the following to answer questions 5-7. A ball is shot straight up from the surface of the earth with an initial speed of 19.6 m/s. Neglect any effects due to air resistance. 5. What is the magnitude of the ball's displacement from the starting point after 1.00 second has elapsed? Ans: 14.7 m 6. What maximum height will the ball reach? Ans: 19.6 m 7. How much time elapses between the throwing of the ball and its return to the original launch point? Ans: 4.00 s
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