Question

1) a)

Consider a particle of mass m = 22.0 kg revolving around an axis with angular speed ω omega. The perpendicular distance from the particle to the axis is r = 1.75 m . (Figure 1)

Which of the following are units for expressing rotational velocity, commonly denoted by ωωomega?

Check all that apply.

( ) radians per second

( ) degrees per second

( ) meters per second

( ) arc seconds

( ) revolutions per second

1) b)

Now that you have found the velocity of the particle, find its kinetic energy K.

Express your answer numerically, in joules

1) c)

A typical ten-pound car wheel has a moment of inertia of about 0.35kg⋅m^2. The wheel rotates about the axle at a constant angular speed making 50.0 full revolutions in a time interval of 7.00 s .

What is the rotational kinetic energy K of the rotating wheel?

Answer in Joules.

Answer 1