Circular Motion and 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

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

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

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

• The initial velocity of the car points down and to the left.

• The final velocity of the car points down and to the right.

• The change in the velocity vector is found from vi – vf.

• The change in the velocity vector is to the right.

Tags

NGSS.HS-PS2-1

• A

• B

• C

• D

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-2

• A

• B

• C

• D

Tags

NGSS.HS-PS2-1