OnRamps Physics Circular Motion

At the position shown in the diagram, which arrow indicates the direction the instantaneous (tangential) velocity of the cart?

• A

• B

• C

• D

Bruno the bat flies at a speed of 0.5 m/s in circle of radius 1 m. What is his acceleration?

• 0.25 ms^-2
• 0.5 ms^-2
• 1 ms^-2
• 2 ms^-2

What object experiences uniform circular motion?

• A car speeding up as it turns left
• A car traveling around a roundabout at a constant speed
• A car slowing down as it crests a tall hill
• A car traveling down the road at a constant speed

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

• outwards
• towards the center
• tangent
• faster

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 and hence, velocity changes, and that net change is directed inward.

• Because they are constantly changing both speed and direction

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

The term centripetal means

• circular motion

• center accepting

• center seeking

• center fleeing

Other than gravity what is the other force that is contributing to the net force of the coaster at the top of the loop?

• Tension Force

• Friction Force

• Centripetal Force

• Normal Force

Identify the force that determines the centripetal force as a car is turning a corner.

• Friction Force

• Tension Force

• Normal Force

• Centripetal Force

When an object experiences uniform circular

motion, the direction of the net force is:

• in the same direction as the motion of the object.

• in the opposite direction of the motion of the

  object.

• is directed toward the center of the circular path.

• is directed away from the center of the circular

  path.

Is it possible for an object moving with a constant

speed to accelerate? Explain.

• No, if the speed is constant then the

  acceleration is equal to zero.

• No, an object can accelerate only if there is a

  net force acting on it.

• Yes, although the speed is constant, the

  direction of the velocity can be changing.

• Yes, if an object is moving it is experiencing

  acceleration