Free Fall and Acceleration

If an object is in free fall for three seconds, how fast will it be falling? use g = 9.8 m/s/s

• 9.8 m/s

• 19.6 m/s

• 29.4 m/s

• 39.2 m/s

Tags

NGSS.HS-PS2-1

Heavier objects free fall faster than lighter objects.

• True

• False

Tags

NGSS.MS-PS2-4

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 pumpkin is dropped from a 35 m building. What is its initial velocity (v_i)?

• 9.8 m/s²
• 35 m
• 0 m/s
• 9.8 m/s

What does this graph represent?

• constant velocity

• constant acceleration

• stationary

• constant displacement

This is a velocity-time graph.  What is the object doing in segment B?

• Positive acceleration
• Negative acceleration
• Constant Velocity
• Not moving

Tags

NGSS.HS-PS2-1

A textbook is dropped from a second floor window on the moon and falls to the surface. What happens to the acceleration as the book falls?

• the acceleration increases

• the acceleration decreases

• the acceleration remains constant

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4

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

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4

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

Tags

NGSS.HS-PS2-1

A ball is thrown upward with an initial speed of 30m/s. At what location will the ball be moving downward with a speed of 20m/s

• A

• B

• E

• F