Concept Quiz 6.3-6.5 (Circular Motion)

What is the direction of the velocity at point B, if the ball is revolving clockwise?

• up
• right
• down
• left

What is the direction of the velocity at point A, if the ball is revolving clockwise?

• up
• right
• down
• left

Centripetal acceleration always points

• in the direction of the object's motion
• in the opposite direction of the object's motion
• towards the center of the circle
• towards the outside of the circle

The velocity is always _____ to the line of a circle. 

• outwards
• towards the center
• tangent
• faster

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

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

• static friction

• tension

• normal force

• gravitational force

Tags

NGSS.HS-PS2-1

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

• static friction

• tension

• the horizontal component of the 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

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

• it triples

• it decreases by a factor of 6

• it increases by a factor of 6

• it increases by a factor of 9