Circular motion

Circular motion is the Physics of things moving in circles.

• False

• True

Velocity includes what two things? (choose 2)

• direction

• time

• speed

• distance

Which direction is velocity in relation to the circle?

• Inward

• Tangent

• outward

What force pulls an object towards the center of the circle?

• centripetal

• acceleration

• centrifugal

A constant non-zero net force causes

• a constant speed.

• a constant velocity.

• a constant acceleration.

The constant non-zero net force acting on an object moving in a circle results in the object constantly:

*think which direction acceleration is pointed*

• accelerating toward the center of the circle.

• moving at the same velocity.

• slowing down.

• speeding up.

When a constant non-zero net force acts on an object, the acceleration of the object and the force net force always act in the same direction.

• True, always, no exception.

• False, always, never true.

What is the reason the car went off the road and what is another example?

• gain of friction. A comet flying through planetary systems.

• Loss of friction. Same can be applied to swinging a ball on a string and the string snap.

What is the source of the centripetal force acting between the Moon and Earth?

• magic

• gravity

• air friction

• tension

An object with greater mass needs a greater ______ to keep it in circular motion.

• Fc Centripetal force

• Fg Force of gravity

• Vc centripetal velocity