Circular Motion and Gravity Review

The time to complete one rotation or revolution is called

• period

• frequency

• orbit

• quantum

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NGSS.HS-PS4-1

A car moves around a turn with a constant speed of 150 mph and is accelerating. This statement is...

• True, because the velocity is constant

• True, because it is changing direction

• False, because there is no centripetal force

• False, it should be moving in a straight line

What is the period of the Earth's rotation?

• 60 min

• 24 hours

• 30 days

• 365 days

Which of the following best describes an 'orbit'?

• revolution

• rotation

• at rest

• constant velocity

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NGSS.HS-PS2-4

NGSS.HS-ESS1-4

Two planets attract each other with a force of 100 N. If the distance between them is HALVED, what will be the new force of gravity?

• 25 N

• 50 N

• 200 N

• 400 N

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NGSS.HS-PS2-4

Which of the following exerts the strongest gravitational force on you, right now?

• The Sun

• The Earth

• The Moon

• Jupiter

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NGSS.HS-PS2-4

The net force that points towards the center of a circle is called a _____ force

• centripetal

• centrifugal

• revolutionary

• rotational

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NGSS.HS-PS2-1

A record spins at 45 RPM. What's the period of rotation?

• 45 seconds

• 1.33 seconds

• 0.75 seconds

• 0.02 seconds

As two objects move farther away from each other, the gravitational force between them

• increases

• decreases

• stays the same

• it depends on the masses

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NGSS.HS-PS2-4

Astronauts in orbit around the Earth appear weightless because

• the Moon's gravity cancels out the Earth's gravity

• they are above the atmosphere

• they are far enough from the Earth where gravity does not affect them

• they are falling

Tags

NGSS.HS-ESS1-4