QUIZ – PROJECTILE MOTION

1. A basketball is thrown upwards on an arc at a 60-degree angle with the horizontal. If the
velocity of the ball is 5 m/s how fast must the thrower run to catch the ball after it is released?
A. 2.5 m/s C. 5.0 m/s
B. 4.3 m/s D. 10 m/s

2. A person throws a ball at an angle of 30o with the horizontal with a velocity of 32 m/s. As the
ball is thrown, a second person is running past the thrower at a constant velocity. At what
velocity must this second person run so that she may catch the ball as it hits the ground?
A. 32sin 30o m/s C. 32tan 30o m/s
B. 32cos 30o m/s D. 64cos 30o m/s

3. A baseball player throws a ball horizontally. Which statement best describes the ball's motion
after it is thrown? [Neglect the effect of friction.]
A. Its vertical speed remains the same, and its horizontal speed increases.
B. Its vertical speed remains the same, and its horizontal speed remains the same.
C. Its vertical speed increases, and its horizontal speed increases.
D. Its vertical speed increases, and its horizontal speed remains the same.

4. A bullet is fired horizontally at a velocity of 200 m/s at a height of 1 m. At the same time,
another bullet is dropped 1 m from rest. The difference between t 1, the time it takes the fired
bullet to hit the ground, and t2, the time it takes the dropped bullet to hit the ground is ___.
A. 0 s C. 2 s
B. 1 s D. 4 s

Base your answers to questions 5 and 6 on the following information: A ball is thrown horizontally
20 m above the ground with a velocity of 5 m/s.

5. How far from the base of the cliff will the ball land?
A. 5.6 m C. 10 m
B. 9.2 m D. 12 m

6. How much time will pass before the ball hits the ground?
A. 2 s C. 4.6 s
B. 2.8 s D. 6 s

7. A projectile is fired with an initial velocity v0 at an initial angle 𝜽0 with the horizontal. Which
of the following pairs of graphs below best represents the horizontal components of the
velocity, v, and acceleration, a, of the projectile as functions of time?

A.

B.

C.

D.
Base your answers to questions 8 and 9 on the following information: From a cliff of height 28.8
m above the ground, a ball is thrown horizontally with an initial velocity of 7 m/s.

8. What is the range of the ball?

9. The magnitude of the velocity of the ball when it strikes the ground is most nearly
A) 15 m/s. C) 25 m/s.
B) 20 m/s. D) 30 m/s.

Base your answers to questions 10 through 13 on the following information: A cannonball is fired
and follows the parabolic path shown below. Air resistance is negligible. Point B is the highest
point on the path and points A and C are at the same height.

10. Which of the following best describes the direction of the velocity of the cannonball at point
B?
A. to the right C. down and to the right
B. up and to the right D. down

11. Which of the following best describes the direction of the acceleration of the ball at point C?
A. down and to the right C. up and to the right
B. down D. up and to the left

12. How do the accelerations of the ball at the three points compare?
A. 𝑎𝐴 < 𝑎𝐵 < 𝑎𝐶 C. 𝑎A = 𝑎B < 𝑎C
B. 𝑎𝐵 < 𝑎𝐴 < 𝑎𝐶 D. 𝑎B < 𝑎A = 𝑎C

13. How do the speeds of the cannonball at the three points compare?
A. 𝑣𝐴 < 𝑣𝐵 < 𝑣𝐶 C. 𝑣𝐴 < 𝑣𝐵 = 𝑣𝐶
B. 𝑣𝐵 < 𝑣𝐴 < 𝑣𝐶 D. 𝑣𝐵 < 𝑣𝐴 = 𝑣𝐶

14. Two projectiles are launched from the same height with the same initial speed: one at 30° and
the other at 60°. Which statement correctly describes their motion?
A. Both have the same maximum height and time of flight.
B. The 60° projectile has greater maximum height, but both have the same horizontal range.
C. The 30° projectile has greater maximum height but shorter range.
D. The 60° projectile has greater range than the 30° projectile.

15.A stone is thrown upward at an angle. At the highest point of its trajectory (neglecting air
resistance), which statement is true?
A. The stone’s vertical velocity is zero, and its horizontal velocity is zero.
B. The stone’s vertical velocity is zero, but its horizontal velocity remains constant.
C. The stone’s vertical and horizontal velocities are both maximum.
D. The stone’s vertical velocity is maximum, but horizontal velocity is zero.