Physics Chapter 7 Circular Motion

When an object is moving in a circle, its linear velocity is often called its __________ velocity.

• centripetal

• tangential

• gravitational

• centrifugal

When finding the speed of an object in a circular path, the distance needed is called the

• diameter

• perimeter

• radius

• circumference

An object that is in uniform circular motion has a speed that is

• increasing

• decreasing

• constant

• both a and b

If an object is spinning around on a string and the string was suddenly cut, the object would move in a

• curved path

• straight line

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When an object is moving in a circular path and accelerates because of a change in a velocity’s direction, this is called

• tangential acceleration

• centripetal acceleration

When an object is moving in a circular path and accelerates because of a change in an object’s speed, this is called

• tangential acceleration

• centripetal acceleration

Centripetal force is the net force working on an object that moves through a circular path. Which of the following are examples of centripetal force?

• gravity

• friction

• tension

• all of the above

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A ball attached to a string is moved at constant speed in a horizontal circular path. A target is located near the path of the ball as shown in the diagram below. At which point along the ball’s path should the string be released, if the ball is to hit the target?

• Point A

• Point B

• Point C

• Point D

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Which arrow indicates the direction of the centripetal force of the cart?

• Point A

• Point B

• Point C

• Point D

Which arrow indicates the direction of the tangential velocity vector of the cart?

• Point A

• Point B

• Point C

• Point D