Circular Motion & Gravitation

Centripetal force, created by swinging something in a circle, acts in a direction--

• along the path of motion

• away from the center of the circle

• toward the center of the circle

• tangent to the circle

A 10kg car travels at a constant speed of 20.0 m/s around a horizontal circular track. Which diagram correctly represent the direction of the car's velocity (v) and the direction of the centripetal force (Fc) acting on the car at a particular moment?

• 
• 
• 
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Tags

NGSS.HS-PS2-1

What is the difference between centripetal and centrifugal forces?

• Centripetal is towards center while centrifugal is away from the center.
• Centrifugal is towards center while centripetal is away from the center.
• Neither of the above is correct

Two objects are attracted to each other with 36 N of gravitational force.
What would the force between them be if one of the masses were doubled?

• 9
• 18
• 72
• 144

Tags

NGSS.HS-PS2-4

At point P, he car hits an area of ice and loses all frictional force on it tires. Which path does the car follow on the ice?

• A

• B

• C

• D

Tags

NGSS.HS-PS2-1

Assuming Andromeda rotates at a uniform rate, which stars are moving the fastest?

• Stars closest to center
• Stars furthest from the center
• Stars with the hottest temperature
• Stars with the coldest temperature

Tags

NGSS.HS-ESS1-4

A race car completes three laps of a circular track with a radius of 35 m in 9.0 seconds. Determine the speed of the car.

• 3.9 m/s

• 73.3 m/s

• 24.4 m/s

• 1.0 m/s

Two masses 8000 kg and 1500 kg are 1.5 m apart. Find their gravitational pull.

• 3 N

• 0.0003 N

• 3000 N

• 30 N

Tags

NGSS.HS-PS2-4

If the orginal force of gravity is 100 N and the distance is doubled then the force of gravity is

• 200
• 50
• 400
• 25

Tags

NGSS.HS-PS2-4

a car going around a curve - identify the centripetal force:

• friction

• tension

• force normal

• force weight