Uniform Circular Motion Review

If the tangential velocity increases for an object in uniform circular motion, the centripetal acceleration ...

• increases

• decreases

• stays the same

When the radius increases for an object in uniform circular motion, the centripetal acceleration...

• decreases

• increases

• stays the same

What is centripetal force?

• any net force causing uniform circular motion

• a fictitious force that seems to push objects outward as it travels in a circle

• a force of attraction that exists between all objects

What is uniform circular motion?

• Moving in a circle with a constant speed

• moving in a circle with constant velocity

• any motion along a curved path

An object's orbital period (T) refers to...

• how long it takes to complete one revolution

• how long it takes to stop

• how long it's been rotating

• how far away it is from the center of rotation

What is tangential velocity?

• the speed at any point along an object's orbital path

• the speed of an object in free fall

• the initial velocity in the y direction

• the initial velocity in the x direction

Newton's 1st Law states that in the absence of an external force, objects will continue moving with the same __.

• speed and direction

• mass and acceleration

• displacement and time

• acceleration and force

Newton's 2nd Law states that a force will cause an object to ____ in the same direction as the force

• accelerate

• increase its velocity

• rotate

• increase its displacement

If the radius is reduced by a third, the centripetal acceleration is..

• tripled

• reduced by a third

• doubled

• reduced by half

If the radius is reduced by half, the acceleration is...

• doubled

• reduced by half

• tripled

• quadrupled