Free Fall Review

A ball is thrown up in the air with an initial velocity of 40 m/s. What is the ball's velocity after 2 seconds? 

• 0 m/s 
• 20 m/s traveling upward
• 20 m/s traveling downward
• 40 m/s traveling downward

Tags

NGSS.HS-PS2-1

Which would hit the ground first if dropped from the same height in a vacuum—a feather or a metal bolt?

• the feather
• the metal bolt
• They would hit the ground at the same time.
• They would be suspended in a vacuum.

Tags

NGSS.HS-PS2-4

A free falling object falls for 1.6 s. What is the final velocity?

• -15.68 m/s
• - 9.8 m/s
• - 6.125 m/s
• - 25.088 m/s

Tags

NGSS.HS-PS2-4

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

• 9.8 m/s²
• 9.8 m/s
• 0 m/s²
• 0 m/s

Tags

NGSS.HS-PS2-1

In a normal environment, why does a bowling ball and feather hit the ground at different times when dropped from the same height?

• They don't; they hit the ground at the same time.
• One is more dense than the other.
• One is heavier than the other.
• Air resistance 

The standard acceleration due to gravity is _____.

• 9.8 m/s.

• 9.8 m.

• -9.8 m/s².

• -9.8 m/s

Free fall takes into consideration the frictional force of air resistance.

• True

• False

Tags

NGSS.MS-PS2-2

If an object is in free fall for three seconds, how fast will it be falling?

• -9.8 m/s

• -19.6 m/s

• -29.4 m/s

• -39.2 m/s

What happens to the velocity of a ball as it is dropped off a cliff?

• It decreases

• It increases

• It is constant

What happens to the acceleration of a ball as it is dropped off a cliff?

• It decreases

• It increases

• It is constant