Uniform Circular Motion

A particle P is moving in a circle with uniform speed. Which one of the following diagrams correctly shows the direction of the acceleration a and velocity v of the particle at one instant of time?

• A
• B
• C
• D

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 acceleration at point B, if the ball is revolving clockwise?

• up
• right
• down
• left

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

• outwards
• towards the center
• tangent
• faster

Which statement is true about an object that is traveling in uniform circular motion?

• The speed of the object varies.
• The net force on the object is directed toward the center of the circular path.
• The direction of the object's velocity is constant.
• The net force on the object is directed away from the center of the circular path.

Tags

NGSS.HS-PS2-1

You swing a bucket of water attached to a string in a circle above your head. What keeps the water in the bucket?

• Friction
• Centripetal Force
• Gravity
• Inertia

Tags

NGSS.MS-PS2-2

A tennis ball on a string is spun clockwise around a circle. After the string breaks, which path will the tennis ball follow?

• Path I

• Path II

• Path III

• Path IV

Tags

NGSS.MS-PS2-2

The _______________________ supplies the centripetal force requirement for the car to move in a horizontal circle. Without it, the car would turn its wheels but would not move in a circle (as is the case on an icy surface).

• friction force

• centrifugal force

• normal force

• applied force

Tags

NGSS.MS-PS2-1

NGSS.MS-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

The amount of time it takes for an object to return to the same position (complete one revolution) is its

• tangential velocity

• tangential acceleration

• centripetal acceleration

• period