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- 1. Multiple Choice
A volleyball hit into the air has an initial speed of 10 meters per second. Which vector best represents the angle above the horizontal that the ball should be hit to remain in the air for the greatest amount of time?
- 2. Multiple Choice
A machine launches a tennis ball at an angle of 25° above the horizontal at a speed of 14 m/s. The ball returns to level ground. Which combination of changes must produce an increase in time of flight of a second launch?
decrease the launch angle and decrease the ball’s initial speed
decrease the launch angle and increase the ball’s initial speed
increase the launch angle and decrease the ball’s initial speed
increase the launch angle and increase the ball’s initial speed
- 3. Multiple Choice
Four identical projectiles are launched with the same initial speed, v, but at various angles above the level ground. Which diagram represents the initial velocity of the projectile that will have the largest total horizontal displacement?
(1)
(2)
(3)
(4)
- 4. Open Ended
A projectile is launched into the air with an initial speed of vi at a launch angle of 30° above the horizontal. The projectile lands on the ground 2.0 seconds later.
How does the maximum altitude of the projectile change as the launch angle is increased from 30° to 45° above the horizontal?
- 5. Open Ended
A projectile is launched into the air with an initial speed of vi at a launch angle of 30° above the horizontal. The projectile lands on the ground 2.0 seconds later.
How does the total horizontal distance traveled by the projectile change as the launch angle is increased from 30° to 45° above the horizontal?
- 6. Multiple Choice
A golf ball is hit at an angle of 45° above the horizontal. What is the acceleration of the golf ball at the highest point in its trajectory? [Neglect friction.]
9.8 m/s2 upward
9.8 m/s2 downward
6.7 m/s2 upward
0.0 m/s2
- 7. Multiple Choice
A projectile launched at an angle of 45° above the horizontal travels through the air. Compared to the projectile’s theoretical path with no air friction, the actual trajectory of the projectile with air friction is
lower and shorter
lower and longer
higher and shorter
. higher and longer
- 8. Multiple Choice
What happens to the object’s acceleration as it travels from A to B?
It increases
It decreases
It remains the same
- 9. Multiple Choice
A golf ball is propelled with an initial velocity of 60 meters per second at 37° above the horizontal. The horizontal component of the golf ball’s initial velocity is
30 m/s
36 m/s
40 m/s
48 m/s
- 10. Multiple Choice
A golf ball is hit with an initial velocity of 15 meters per second at an angle of 35° above the horizontal. What is the vertical component of the golf ball’s initial velocity?
8.6 m/s
9.8 m/s
12 m/s
15 m/s
- 11. Multiple Choice
An outfielder throws a baseball to second base at a speed of 19.6 m/s and an angle of 30° above the horizontal.
Which pair represents the initial horizontal velocity (vx ) and initial vertical velocity (vy ) of the baseball?
vx = 17.0 m/s and vy = 9.80 m/s
vx = 9.80 m/s and vy = 17.6 m/s
vx = 19.4 m/s and vy = 5.90 m/s
vx = 5.90 m/s and vy = 19.4 m/s
- 12. Multiple Choice
When the lever is released, the support rod withdraws from ball B, allowing it to fall. At the same instant, the rod contacts ball A, propelling it horizontally to the left. Which statement describes the motion that is observed after the lever is released and the balls fall? [Neglect friction.]
Ball A travels at constant velocity.
Ball A hits the tabletop at the same time as ball B.
Ball B hits the tabletop before ball A.
Ball B travels with an increasing acceleration.
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