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3 cards from this section. Quick, good the night before a test.
Define rotational kinetic energy.
Think about the energy associated with motion but in rotation.
What does I stand for in the E_rot formula?
Consider how mass is spread out in an object.
What is the formula for rotational kinetic energy?
Review the formula discussed in class.
True or False: Moment of inertia is the same for all shapes.
Consider how a point mass changes if the axis of rotation changes.
A solid cylinder with a moment of inertia of 8 kg·m² is rotating at an angular velocity of 5 rad/s. If it is slowed down to 2 rad/s, how much rotational kinetic energy is lost in this process?
Calculate initial and final energies to find the difference.
If a wheel has an angular velocity of 12 rad/s and you increase the angular velocity to 20 rad/s while keeping the moment of inertia constant, how does the rotational kinetic energy change?
Use the formula for rotational kinetic energy to calculate each state and find the difference.
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