Projectile Motion

In the absence of air friction, the horizontal component of a projectile's velocity doesn't change as the projectile moves. 

• True
• False
• Sometimes true
• Sometimes false

Which of the following would NOT be considered a projectile? 

• a cannonball thrown straight up
• a cannon ball rolling down a slope
• a cannonball rolling off a table
• a cannonball thrown in the air

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

• True
• False

If I throw a crayon straight up at 12m/s, how fast is its speed when i catch it at the same height?

• -6 m/s
• -12 m/s
• -18 m/s
• -24 m/s

What is the horizontal acceleration of a projectile?

• 0 m/s²
• -9.8 m/s²

What is true about the vertical velocity of a projectile launched horizontally?

• It is initially at its maximum value.

• It increases due to gravity as it falls.

• It remains constant throughout its trajectory.

• It decreases as it falls due to gravity.

A ball is thrown horizontally at a height of 2.2 meters at a velocity of 65 m/s. Assume no air resistance. How long until the ball reaches the ground?

• 0.45 s
• 0.67 s
• 0.22 s
• 0.47 s

The initial horizontal velocity of a projectile is ____ its final horizontal velocity.

• less than

• equal to

• greater than

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

• 9.8 m/s²
• 9.8 m/s
• 0 m/s²
• 0 m/s

In a projectile motion we always have...

• 1 component (x)

• 3 components (x,y, and z)

• 2 components (x and y)

• 0 components