Linear and Projectile Motion Test Review
1. Compare and contrast speed and velocity.
2. Define acceleration.
3. What is the equation for finding average velocity?
4. What is the equation for finding acceleration?
5. Compare and contrast scalar quantity and vector quantity.
6. Give three examples of a scalar quantity.
7. Give three examples of vector quantity.
8. What is free fall?
9. What is the value for the acceleration due to gravity here on Earth?
10. What are the standard metric units for the following quantities: velocity, acceleration, time, mass,
acceleration due to gravity, and displacement?
11. Define projectile.
12. What is the path that a projectile follows?
13. Give three examples of a projectile.
14. How do you find the velocity of a freely falling object that starts from rest?
15. How do you find the displacement of a freely falling object that starts from rest?
16. A ball is thrown straight up with a velocity of 30 m/s:
a. What is its velocity when it is first let go?
b. What is its acceleration when it is first let go?
c. What is its velocity at its highest point?
d. What is its acceleration at its highest point?
e. What is its velocity the instant before you catch it?
f. What is it acceleration the instant before you catch it:
17. When a person jumps off the ground in happiness, like right after being told there will be a
physics test, what is their acceleration once their feet are off the floor?
18. How does the horizontal component of velocity of a projectile change during its flight:
a. If it is propelled horizontally?
b. If it is propelled at an angle?
19. How does the vertical component of velocity of a projectile change during its flight:
a. If it is propelled horizontally?
b. If it is propelled at an angle?
20. If a ball is thrown into the air at some angle, at the top of the ball’s path, is its velocity entirely
vertical, entirely horizontal, or a combination of both?
21. At what part of its path does a projectile have minimum speed?
22. If you launch a marble at 30°, at what other angle will the range of the marble be the same?
23. If a cannonball is fired horizontally and at the same instant another cannonball is dropped straight
down from the same height, which will hit the ground first?
24. What happens to an object as it free falls?
25. Describe what will happen to an objects motion in the following cases:
a. The object’s velocity is positive and the acceleration is positive.
b. The object’s velocity is negative and the acceleration is positive.
c. The object’s velocity is positive and the acceleration is negative.
d. The object’s velocity is negative and the acceleration is negative.
Problems:
1. A truck has an initial velocity of 10.0 m/s. It experiences a constant acceleration of 5.0 m/s 2.
What is the final velocity after 5.0 s?
2. A wagon has an initial velocity of 4.0 m/s and undergoes a constant acceleration of 4.0 m/s 2.
What is the cart’s displacement after 4.0 s?
3. A plane accelerates from 0 m/s to 70 m/s in 6.0 s, what is the plane’s acceleration?
4. If the same plane accelerates from 0 m/s to 70 m/s with a displacement of 120 m, what is the
plane’s acceleration?
5. A soccer ball is kick horizontally. What is its average speed if its displacement is 30 m after 5.0 s?
6. A car accelerates at a constant rate from rest to a speed of 30 m/s in 8.0 s. What is the
displacement of the car in this time interval?
7. A ball is thrown straight up with an initial velocity of 30.0 m/s. What time elapses between its
being thrown and its return to its launch point?
8. A coin is dropped from a tower. It hits the ground after 8.0 s. What is the height of the tower?
What is the speed as it hits the ground?
9. A plane is flying north at a velocity 100 km/h against a head wind of 25 km/h. What is the
resultant velocity of the plane?
10. The same plane is flying north at the same velocity as the previous problem, but the wind is
blowing at a right angle to the plane’s velocity. What is the resultant velocity of the plane?
11. While following directions on a treasure map, a person walks 45.0 m south, then turns and
walks 7.50 m east. Which single straight-line displacement could the treasure hunter have
walked to reach the same spot?
12. A skier is skiing down a slope of 30° at a velocity of 45.0 m/s. What are the vertical and
horizontal components of the skier’s velocity?
13. A cannonball is fired horizontally from the edge of a cliff at a velocity of 100 m/s. If the cliff is
100 m high, how far from the edge of the cliff does the cannonball land?