Uniform Circular Motion

What is uniform circular motion?

• Motion in a straight line at constant speed

• Motion along a circular path at constant speed

• Motion along a circular path with increasing speed

• Random circular motion

What is the direction of centripetal acceleration?

• Tangential to the circle

• Towards the center of the circle

• Away from the center of the circle

• Perpendicular to the motion

What provides the centripetal force for a car turning on a road?

• Gravity

• Friction

• Engine power

• Air resistance

Why does an object in uniform circular motion experience acceleration?

• Its speed changes constantly

• Its velocity changes direction continuously

• It slows down during the motion

• There is no acceleration in uniform circular motion

What happens to the centripetal force if the speed of an object doubles while moving in the same circular path?

• It doubles
  

• It quadruples

• It remains the same

• It halves

A car travels in a circular path at constant speed. What happens to its velocity vector?

• It remains constant

• It changes direction continuously

• It increases in magnitude

• It decreases in magnitude

If the radius of a circular path increases while the speed remains constant, what happens to the centripetal acceleration?

• It increases

• It decreases

• It remains the same

• It becomes zero