Projectile Motion

What is the horizontal acceleration of a projectile?

• 0 m/s²
• 9.8 m/s²

What is the vertical acceleration of a projectile?(neglect air resistance) 

• 0 m/s²
• 9.8 m/s²

In a projectile motion we always have...

• 1 component (x)

• 3 components (x,y, and z)

• 2 components (x and y)

• 0 components

If you throw a baseball straight up, what is its velocity at the highest point?

• 10 m/s²

• 10 m/s

• 0 m/s²

• 0 m/s

The more mass an object has, the faster it will fall.

• True
• False

Two objects - one with mass m and the other with mass 2m - are released from rest at the same height. Which object hits the ground first?

• mass m
• mass 2m
• both objects hit the ground at the same time
• unable to determine with information given

Does vertical velocity change as a projectile rises and falls?

• yes 
• no

Does horizontal velocity change as a projectile rises and falls?

• yes

• no

An object is shot from the ground (at 25 m/s) at 25 degrees and 65 degrees.  Which one rises to a higher height? (assume no air resistance)

• 25 degrees
• 65 degrees
• same for both

In the picture, cannonball A was launched at 10 m/s at 60°, and B was launched at 18 m/s at 25°. The cannonball that hit the ground first was

• A, because it had less total velocity.

• B, because it had more total velocity.

• A, because it had less initial vertical velocity.

• B, because it had less initial vertical velocity.