1. A projectile is shot at an angle of 30° above the horizontal at 50m/s. How far does it travel?

a. 31.9 m

b. 63.7m

c. 220.7 m

d. 127.5 m

2. A projectile is shot with an initial velocity of 28.3 m/s at an angle of 45.0° above the horizontal. What is the maximum height it will reach?

a. 20.4 m

b. 40.8 m

c. 67.9 m

d. 70 m

3. A projectile is shot at an angle of 30° above the horizontal at 50m/s. At what point does the magnitude of the acceleration reach a minimum? (no air resistance)

a. just after it leaves the gun

b. just before hitting the ground

c. at the top of the trajectory

d. there is no change in the acceleration

4. An arrow is shot at an angle of 30° above the horizontal at a speed of 60.0 m/s from the top of a 15.1 m tall building. What is the maximum height of the arrow above the ground?

a. 45.9 m

b. 61 m

c. 68.8 m

d. 137.6 m

5. A 5 kg mass is dropped from a platform and strikes the ground in 4 seconds. If a second 5kg mass is shot horizontally from the same platform, it will hit the ground in:

a. 4s

b. more than 4s

c. less than 4s

d. Impossible to tell without knowing the initial velocity of the second ball

6. A ball that is shot from ground level into the air with a 25 m/s vertical component of the velocity will hit the ground in:

a. 2.55 s

b. 5.1 s

c. 9.8 s

d. insufficient information is given to answer this question

7. Other than an angle of 45°, when a projectile is launched from the ground at an angle of θ above the horizontal, there is another angle β where if the projectile is launched at the same velocity it will travel the same horizontal distance. θ and β are related by:

a. θ = 2β

b. β = 90 - β

c. θ = 90 + β

d. β = 2θ

e. β = 45 - θ

8. A golf ball is hit with a speed of 75 m/s at 45° above the horizontal. What is its speed just before it strikes ground? (no air resistance)

a. 7.3 ms^-1

b. 26 ms^-1

c. 53 ms^-1

d. 75 ms^-1

e. none of these

9. A projectile is fired horizontally from the top of a 122.7 m structure with an initial speed of 49 m/s. The projectile travels a horizontal distance of 200 m from the bottom of the structure. What is the velocity of the projectile right before it hits the ground?

a. 49 m/s at -90º to the horizon

b. 69.4 m/s at a -45º to the horizon

c. 49 m/s at 90º to the horizon

d. 69.4 m/s at a +45º to the horizon

e. 49 m/s parallel to the horizon

10. A plane flying at a constant velocity in level flight drops a supply package to survivors on a very small peak surrounded by steep cliffs. Neglecting air resistance, which one of the following is NOT true?

a. The plane must be over the survivors when the supply package is released

b. The acceleration due to gravity, g, remains constant for the supply package

c. The horizontal velocity of the supply package and the plane are equal when it hits the peak

d. The supply package travels in a curved path

e. all of the statements above are true

11. A horizontally thrown ball has a velocity v has a horizontal range of d. If the velocity is doubled, its horizontal range R would be:

a. 4d

b. d/2

c. 3d

d. 2d