circular calculation stand and deliver

A wheel with a diameter of 1.2 m is rotating at 30 rad/s. What is the freqency in Hertz?

• 5.73 Hz

• 4.78 Hz

• 3.14 Hz

• None of these is correct

A wheel with a radius of 1.4 m (one of those BIG bicycle wheels from the 1800s) covers 2250 m in 217s. How many rad/s is this?

• 10.4 rad/s

• 14.65 rad/s

• 7.41 rad/s

• None of these is correct

A wheel with a radius of .5 m is rolling down an incline. What is the length of the incline if the wheel rotates 17.5 times?

• 55.0 m

• 27.5 m

• 8.25 m

• None of these is correct

Which of these are both translational and rotational motion?

• A block sliding across a table

• A gymnast rotating in the air

• A rock falling

• none of these is correct

A ball with a radius of 12.5 cm covers 5.0 m in 8.0s. What is the linear velocity?

• .0156 m/s

• .078 m/s

• .625 m/s

• none of these is correct

A ball with a radius of 12.5 cm covers 5.0 m in 8.0s. What is the angular velocity?

• 6.37 rad/s

• 40 rad/s

• 5 rad/s

• none of these is correct

A wheel rolls through 125 rad in 6.2 s. If the radius is 1.88 m, how many rotations is this?

• 19.9 rotations

• 125 rotations

• 20.2 rotations

• none of these is correct

What are the units for Hertz?

• rotations/s

• cycles/s

• N/s

• revolutions/s

The rate of spin of the Earth's surface at the equator is roughly 460 m/s. The radius of the Earth is 6.4 E 6 m. What is the acceleration at the surface at the equator due to our spin?

• 9.81 m/s/s

• .0000719 m/s/s

• .033 m/s/s

• none of these is correct

A car is moving along a curve to the left. What direction is the centripetal force?

• up

• down

• right

• left