Free fall quiz

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 (floating) in a vacuum.

Which would fall with greater acceleration in a vacuum—a leaf or a stone?

• the leaf
• the stone
• They would accelerate at the same rate.
• It is difficult to determine without more information.

A freely falling object starts from rest. After falling for 6 seconds, it will have a speed of about:

• 6m/s

• 36m/s

• 60m/s

• 12m/s

A baseball is thrown up into the air. What happens to the velocity as the ball rises in the air?

• the velocity increases

• the velocity decreases

• the velocity remains constant

A baseball is thrown up into the air. What happens to the acceleration as the ball rises in the air?

• the acceleration increases

• the acceleration decreases

• the acceleration remains constant

Which of the dot diagrams best describe the motion of a free-falling object that is dropped from rest?

• Diagram A

• Diagram B

• Diagram C

As a rock in FREE FALL falls through the air, acceleration

• stays constant

• decreases until it hits terminal velocity

• increases until it hits terminal velocity

• increases ~10 m/s each second

Free fall is

• moving through the air under the influence of the force of gravity only.

• not paying for a fall.

• clothing sale with lots of orange & brown clothes.

• a feather dropped from an airplane.

If a ball is thrown up and lands at the same location, what was its acceleration?

• -9.8 m/s² on the way up and +9.8 m/s² on the way down.

• -9.8 m/s² the entire time.

• +9.8 m/s² on the way up and -9.8 m/s² on the way down

What is the velocity of a ball that has been dropped off a cliff after 1 , 2, 3, 4, and 5 seconds? (assume g is rounded to 10 m/s²)?. 

• 10, 20, 30, 40, 50 m/s
• 5, 10, 15, 20, 25 m/s
• 5, 20, 45, 80,125 m
• 10,10,10,10,10 m/s