Circular Motion Review

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

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

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

• friction

• tension

• normal force

• gravitational force

A curved groove is place on the top of a level table as shown in the diagram. A ball is pushed in the groove at P so that it leaves at Q. Which picture shows how the ball will move when it leaves the groove at Q?

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Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-2

What happens to the centripetal force exerted on an object if you triple the velocity?

• it increases to 3X
• it decreases to 6X
• it increases to 6X
• it increases to 9X

A satellite of mass m and speed v orbits the Earth at a distance r from the centre of the Earth. The gravitational field strength due to the Earth at the satellite is equal to.

• v/r
• v²/r
• mv/r
• mv²/r

Tags

NGSS.HS-PS2-4

As the radius of a spinning object decreases, acceleration

• increases

• decreases

• stays the same

If a planet's mass doubles and radius doubles. what happens to its gravitational acceleration?

• stays same

• doubles

• halves

• is 1/4

• quadruples