Centripetal Motion Review

• Force

• Frequently

• Frequency

• Friction

• tangential velocity

• centripetal acceleration

• period

• angular velocity

• walrus

20 seconds to do 4 spins. Frequency = _______

• 5 rev/sec

• 0.2 rev/sec

• 0.25 rev/sec

• 80 rev/sec

Units on period.

• seconds

• rev/sec

• rad/sec

• m/s

Tangential velocity

• How fast an object spins.

• Acceleration pointed toward center

• How fast an object flies off in a straight line

• Number of spins per second

T

• Total Time

• Torque

• Tension

• Period

Units on Angular velocity

• rpm

• rad/sec

• rev/sec

30 seconds for 6 spins. Period = ___________

• 30 sec

• 0.2 sec

• 5 sec

• 6 sec

Centripetal force

• A force that always points outward

• A force that always points tangent to the circle

• A force that always points toward the center

• A force that always points up

A ride is spinning at 10 rev/s. What is the angular velocity?

• 62.8 rad/s

• 10 rad/s

• 0.628 rad/s

• 15.7 rad/s