Uniform Circular Motion Basics

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

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

• outwards
• towards the center
• tangent
• faster

An object is moving with uniform speed in a horizontal, counterclockwise circle. At location B, which way does the acceleration vector point?

• Left

• Right

• Up

• Down

Tags

NGSS.HS-PS2-1

An object is moving with uniform speed in a horizontal, counterclockwise circle. At location D, which way does the centripetal force vector point?

• Left

• Right

• Up

• Down

Tags

NGSS.HS-PS2-1

If an object is spinning around on a string and the string was suddenly cut, the object would move in a

• curved path

• straight line

Tags

NGSS.HS-PS2-1

When an object is moving in a circle, its linear velocity is often called its __________ velocity.

• centripetal

• tangential

• gravitational

• centrifugal

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

When an object is in circular motion it is constantly changing its velocity.

• True
• False

Is it possible for an object moving with a constant speed to accelerate?  Explain. 
A) No, if the speed is constant then the acceleration is equal to zero.  B) No, an object can accelerate only if there is a net force acting on it.  
C) Yes, although the speed is constant, the direction of the velocity can be changing.  
D) Yes, if an object is moving it can experience acceleration 

• A
• B
• C
• D

Tags

NGSS.HS-PS2-1