Topic 6: Circular Motion

Uniform circular motion is the motion of an object in a circle with a ________________ but the direction of the velocity is continually changing with time.

• uniform acceleration

• constant velocity

• constant speed

Angular velocity, ω defined as the rate of change of _________________

• angular distance

• uniform speed

• angular displacement

A body is moving in a circular path with a constant speed. It has

• Constant velocity

• An acceleration which varies with time

• Acceleration of constant magnitude

A car is making a turn at speed v. The radius of the turn is r and the centripetal force on the car is F.If the car rounds the same curve at speed 2v, the required centripetal force is

• 1/2 F

• F

• 2F

• 4F

Which of the following statements is not true for a stone attached to a string and swung in a uniform vertical circular motion?

• The magnitude of resultant force acting on the stone changes depending on the position of the stone in the circle.

• The tension in the string is lowest when the stone is at the highest point of the circular motion.

• The kinetic energy of the stone is constant throughout the entire circular motion.

• The resultant acceleration is always directed towards the centre of the circle.

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

• True
• False

Tags

NGSS.HS-PS2-1

As the moon orbits the earth, what keeps the moon moving in a circular motion?

• Gravity
• Inertia
• Centripetal Force
• Friction

Tags

NGSS.HS-ESS1-4

NGSS.HS-PS2-1

NGSS.HS-PS2-4

Which of the following depict the velocity of the ball?

• A

• B

• C

• D

What is the direction of the velocity at point B, 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