Free Fall Acceleration 2019

In Newtonian physics, ________________ is any motion of a body where gravity is the only force acting upon it.

• kinematics

• free fall

• mechanics

• velocity

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NGSS.HS-PS2-4

The standard acceleration due to gravity (or standard acceleration of free fall), near the surface of the Earth. It is defined by standard as:

• 9.8 m/s.

• 9.8 m.

• -9.8 m/s².

• -9.8 s.

Which of the following graphs best represents free fall motion?

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NGSS.MS-PS3-1

NGSS.MS-PS3-5

A man drops his camera off of the top of a tower and it takes 6 seconds to hit the ground. Which of the following equations would he use in order to calculate the speed the camera was travelling when it hit the ground?

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

• True

• False

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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

Tags

NGSS.MS-PS2-4

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.

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NGSS.HS-PS2-4

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

• It decreases at a uniform rate

• It increases at a uniform acceleration rate

• It is constant

• It increases at a non-uniform acceleration rate

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

Tags

NGSS.MS-PS2-2