Rotating Systems: Energy & Momentum
What is the total kinetic energy of a system that has both translational and rotational motion?
The sum of its translational and rotational kinetic energies.
Only its translational kinetic energy.
Only its rotational kinetic energy.
The difference between its translational and rotational kinetic energies.
A solid cylinder rolls without slipping down an inclined plane. Which of the following affects the acceleration of the cylinder?
The angle of the incline
The mass of the cylinder
The radius of the cylinder
The color of the cylinder
A wheel is rolling with slipping on a surface. If the kinetic friction force is 5 \text{ N}
and the distance over which it slips is 2 \text{ m}
, how much energy is lost due to friction?
2.5 J
10 J
0 J
5 J
A solid disk is rolling down a ramp with slipping. The force of friction between the disk and the ramp does work on the disk. What is the equation for the net force on the disk?
An object with mass is moving at a velocity and rotating with an angular velocity . If its moment of inertia is , what is its total kinetic energy?
9 J
4 J
13 J
18 J
A sphere rolls down an inclined plane. As it descends, its potential energy is converted into both translational and rotational kinetic energy. If the sphere's initial potential energy is 100 \text{ J}
, and at some point its translational kinetic energy is 60 \text{ J}
, what is its rotational kinetic energy at that...
160 J
40 J
60 J
0 J
What is the primary difference between rolling with slipping and rolling without slipping in terms of energy?
Rolling with slipping conserves mechanical energy, while rolling without slipping does not.
Rolling without slipping conserves mechanical energy, while rolling with slipping does not due to kinetic friction.
Both conserve mechanical energy.
Neither conserves mechanical energy.

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A ball is rolling with slipping. How does the work done by kinetic friction affect the mechanical energy of the system?
It increases the mechanical energy.
It decreases the mechanical energy.
It does not change the mechanical energy.
It converts mechanical energy into potential energy.
A block is sliding down a ramp while a cylinder rolls without slipping down an identical ramp. Both have the same mass and start from the same height. Which reaches the bottom first?
The block
The cylinder
They reach at the same time
Cannot be determined
For an object rolling without slipping, what is the relationship between its linear velocity () and angular velocity () if the radius of the object is ?