5. A child throws a ball straight up in the air, which then falls and bounces off the floor. The y-velocity versus time of the ball is plotted from when the ball is released until after it bounces on the floor. Up is +y. -2 a. What was the average y-acceleration of the ball during the time it is in contact with the ground (during the bounce)? Be sure to include the correct sign." -4 -6 -8 0.2 0.4 0.6 0.8 1.2 1.4 Time (seconds) ........... b. How high does the ball go above its release point?. 6. A car is moving at 10 m/s at 30° west of north. Write the velocity vector in component vector form (i.e., using î and j) taking +x to be east and +y to be north. Use cos(30°) = 0.87, sin(30°) = 0.5. Hint: draw the vector and make sure you get the signs and trig functions correct! 7. BONUS: The position of a rabbit is given by: 7(t) = [(7m +5 t)i + (3t)| as a function of time t. What is the velocity as a function of time? y-velocity (m/s) 4.

College Physics
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Author:Raymond A. Serway, Chris Vuille
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Chapter1: Units, Trigonometry. And Vectors
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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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5. A child throws a ball straight up in the air,
4
which then falls and bounces off the floor.
The y-velocity versus time of the ball is
plotted from when the ball is released until
after it bounces on the floor. Up is +y.
a. What was the average y-acceleration of
the ball during the time it is in contact
with the ground (during the bounce)? Be
sure to include the correct sign.
-6
-8
0.2
0.4
0.6
0.8
1.2
1.4
Time (seconds)
.......
b. How high does the ball go above its release point?.
6. A car is moving at 10 m/s at 30° west of north. Write the velocity vector in component vector form (i.e.,
using î and j) taking +x to be east and +y to be north. Use cos(30°) = 0.87, sin(30°) = 0.5. Hint: draw
the vector and make sure you get the signs and trig functions correct!
7. BONUS: The position of a rabbit is given by: 7(t) = (7m +5 t)i + (3t) as a function of time
t. What is the velocity as a function of time?.
y-velocity (m/s)
2.
Transcribed Image Text:5. A child throws a ball straight up in the air, 4 which then falls and bounces off the floor. The y-velocity versus time of the ball is plotted from when the ball is released until after it bounces on the floor. Up is +y. a. What was the average y-acceleration of the ball during the time it is in contact with the ground (during the bounce)? Be sure to include the correct sign. -6 -8 0.2 0.4 0.6 0.8 1.2 1.4 Time (seconds) ....... b. How high does the ball go above its release point?. 6. A car is moving at 10 m/s at 30° west of north. Write the velocity vector in component vector form (i.e., using î and j) taking +x to be east and +y to be north. Use cos(30°) = 0.87, sin(30°) = 0.5. Hint: draw the vector and make sure you get the signs and trig functions correct! 7. BONUS: The position of a rabbit is given by: 7(t) = (7m +5 t)i + (3t) as a function of time t. What is the velocity as a function of time?. y-velocity (m/s) 2.
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