Uniform Circular Motion

What is the direction of the acceleration at point A, 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.

Which of the following depict the speed of the bowling ball?

• A

• B

• C

• D

Tags

NGSS.MS-PS3-1

Calculate the centripetal force required to make a 5 kg ball move with an acceleration of 4 m/s2.

• 10 N
• 20 N
• 30 N
• 40  N

Tags

NGSS.HS-PS2-1

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

Why do objects experience centripetal acceleration even though they can have a constant speed?

• Because they are speeding up as they move in a circle

• Because they are constantly changing direction

• Because they are constantly changing both speed and direction

• Because when you have 100 people pedaling, you can speed up more easily.

You are moving a ball in a circle using a centripetal force. What would the force be if you doubled the radius of the circle?

• Twice as much

• Half as much

• Four times less

• Exactly the same

What is the difference between rotation and revolution?

• Rotation is around another object while revolution is around its own axis.
• Rotation is on its own axis while revolution is around another object.
• They are the same
• Rotation is faster

Tags

NGSS.MS-ESS1-1

What would happen to your weight if Earth's mass was cut in half?

• increase two times because gravitational force increases
• decrease by 1/2 because gravitational force decreases
• decrease by 1/4 because gravitational force increases
• increase by 1/2 because gravitational force decreases

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4