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Physics Ch. 8

QuestionAnswer
Define Torque. A quantity that measures the ability of a force to rotate an object around some axis.
Net torque produces _________. Rotation.
Torque will depend on a ________ and the _________. Force; Lever Arm.
Is torque a vector or scalar quanitity? Vector.
Define Center of Mass. The point at which all the mass of the body can be considered to be concentrated when analyzing transitional motion.
Define Moment of Inertia. The tendency of a body rotation about a fixed axis to resist a change in rotational motion.
What does Moment of Inertia change for? Different shapes.
What are the conditions for equilibrium? 1.) Transitional Equilibrium: The net force on an object must be zero. 2.) Rotational Equilibrium: The net torque on an object must be zero.
What is the unit for torque? (Newton)(Meter)
What is torque/rotating objects similar to? Newton's second law.
Define angular momentum. The product of a rotating object's moment of inertia and angular speed around the same axis.
What is the units for angular momentum? [(Kilogram)(Meter^2)]/(Seconds)
What are some examples of simple machines? Inclined planes, wedge, pulleys, wheel and axle, and a screw.
What does using simple machines result in? You get a mechanical advantage.
Small distance= _______ force. Larger.
_______ distance= smaller force. Large
Define efficiency. How well something does work.
A student says that moment of inertia and mass are the same thing. Explain what is wrong with this reasoning. Moment of Inertia: Inertia that resists change in motion for linear direction. Mass: Inertia that resists change in rotational motion.
Created by: OliviaRoark
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