4-2 Centripetal Force and Acceleration

Front

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

Back

tangent

Front

An object with uniform circular motion has constant _?_ but constantly changing _?_

Back

speed, direction

Front

After the string breaks, which path will a tennis ball follow when spun clockwise around a circle?

Back

Path III

Front

What happens to the centripetal force exerted on an object if you triple the velocity?

Back

it increases to 9X

Front

Which represents the acceleration of the ball?

Back

A

Front

Define centripetal force.

Back

The force that acts on an object moving in a circular path, directed towards the center of the circle.

Front

What is the formula for centripetal acceleration?

Back

a_c = v^2 / r, where v is the linear velocity and r is the radius.

Front

Explain the relationship between speed and centripetal acceleration.

Back

Centripetal acceleration increases with the square of the speed; if speed doubles, acceleration increases by a factor of four.

Front

What is uniform circular motion?

Back

Motion in a circular path at a constant speed.

Front

What happens to the direction of velocity in uniform circular motion?

Back

The direction of velocity continuously changes, even though the speed remains constant.