Intro to Projectile Motion

A ball is thrown upward at a 45˚ angle. In the absence of air resistance, the ball follows a

• tangential curve

• sine curve

• parabolic curve

• linear curve

A heavy red ball is released from rest 2.9 m above a flat, horizontal surface. At exactly the same instant, a yellow ball with the same mass is fired horizontally at 3.0 m/s. Which ball hits the ground first?

• The red ball hits first.

• The yellow ball hits first.

• They hit at the same time.

A 100 g ball rolls off a table and hits 2.0 m from the base of the table. A 200 g ball rolls off the same table with the same speed. It lands at distance

• 1.0 m

• Between 1 m and 2 m

• 2.0 m

• Between 2 m and 4 m

• 4.0 m

Supposing a snowmobile is equipped with a flare launcher that is capable of launching a sphere vertically (relative to the snowmobile). If the snowmobile is in motion and launches the flare and maintains a constant horizontal velocity after the launch, then where will the flare land (neglect air resistance)?

• in front of the snowmobile

• behind the snowmobile

• in the snowmobile

Suppose a rescue airplane drops a relief package while it is moving with a constant horizontal speed at an elevated height. Assuming that air resistance is negligible, where will the relief package land relative to the plane?

• below the plane and behind it

• directly below the plane

• below the plane and ahead of it

Which diagram might represent the initial horizontal velocity of a projectile? (Select all that apply)

• A

• B

• C

• D

• E

Which diagram might represent the initial vertical velocity of a projectile? (Select all that apply)

• A

• B

• C

• D

• E

Which diagram might represent the vertical acceleration of a projectile? (Select all that apply)

• A

• B

• C

• D

• E

A cannon launches a cannonball horizontally off a cliff. Is the cannonball an example of a projectile?

• Yes

• No

A feather slowly falls at a constant speed to the ground after coming loose from a bird. Is the feather an example of a projectile?

• Yes

• No