All Flashcards
What happens when a torque is applied to a rotating object?
The rotational kinetic energy of the object changes (Work-Energy Theorem).
What is the effect of increasing the angular velocity of an object?
The rotational kinetic energy increases (quadratically).
What happens if a rolling object's initial potential energy is converted into both translational and rotational kinetic energy?
The object's linear speed at the bottom of the incline will be less than if all potential energy was converted to translational kinetic energy.
What is the effect of increasing the moment of inertia of a rotating object?
The rotational kinetic energy increases, assuming angular velocity remains constant.
What happens when non-conservative forces (e.g., friction) are present in a rotational system?
Total mechanical energy (including rotational kinetic energy) is not conserved.
What is Rotational Kinetic Energy?
The energy an object possesses due to its rotation.
Define Rotational Inertia (I).
How resistant an object is to changes in its rotation.
Define Angular Velocity (ω).
How fast the object is rotating, measured in radians per second.
What is Translational Kinetic Energy?
The kinetic energy an object possesses due to its linear motion.
What is the Work-Energy Theorem?
Rotational kinetic energy changes when work is done by a torque.
What is the difference between Rotational and Translational Kinetic Energy?
Rotational KE: Energy from spinning | Translational KE: Energy from movement of center of mass.
Compare scalar and vector quantities.
Scalar: Magnitude only | Vector: Magnitude and direction.