# Projectile Motion

7 Questions | Total Attempts: 4149  Settings  • 1.
A diver jumps horizontally off a cliff with an initial velocity 6.0 m/s. The diver strikes the water 3.5 s later. a) What is the approximate vertical speed of the diver upon reaching the surface of the water? b) What is the horizontal speed of the diver 2.5 seconds after the diver jumps? c) How far from the base of the cliff will the diver strike the water?
• 2.
A stone with an initial velocity of zero is dropped from a bridge above a river. After 3 s, the stone strikes the water below the bridge. Approximately how fast is the stone traveling when it strikes the water?
• A.

10 m/s

• B.

20 m/s

• C.

30 m/s

• D.

45 m/s

• 3.
The diagram below shows a football being kicked. Angle θ represents the angle between the horizontal and the ball's initial direction of motion. Which value of θ would result in the ball traveling the longest distance?
• A.

25 degrees

• B.

45 degrees

• C.

60 degrees

• D.

90 degrees

• 4.
If a golf ball is hit with more force at the same angle, its initial acceleration will
• A.

Decrease

• B.

Increase

• C.

Remain the same

• 5.
A pitching machine launches a softball horizontally with no spin. Which of the following statements correctly describes the ball’s motion in the air if the machine is set so that the launch speed is increased?
• A.

The ball’s velocity increases, and the distance it falls in one second decreases

• B.

The ball’s velocity remains the same, and the distance the ball falls in one second decreases

• C.

The ball’s velocity increases, and the distance the ball falls in one second increases

• D.

The ball’s velocity increases, and the distance the ball falls in one second remains the same

• 6.
A punter on the football team can kick the ball at an angle of either 30° or 80°. If he wants to maximize the distance the ball travels, at which angle should he kick the ball?
• A.

The 30° angle because the ball goes further

• B.

The 80° angle because the ball goes further

• C.

The 30° angle because the ball spends more time in the air

• D.

The 80° angle because the ball spends more time in the air

• 7.
A soccer ball is kicked so that at the peak of its trajectory it has a horizontal speed of 21 m/s, is 6 meters above the ground. The entire flight takes 2.2 seconds.  How far away from the kicker does the soccer ball land?
• A.

21 meters

• B.

6 meters

• C.

13.2 meters

• D.

46.2 meters

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