PHY Ch 6: Motion in Two Dimensions

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projectile

an object shot through the air, such as a football, that has independent vertical and horizontal motions and, after receiving an initial thrust, travels through the air only under the force of gravity

trajectory

the path of a projectile through space

uniform circular motion

the movement of an object or particle trajectory at a constant speed around a circle with a fixed radius

centripetal acceleration

the center-seeking acceleration of an object moving in a circle at a constant speed

centripetal force

the net force exerted toward the center of the circle that causes an object to have a centripetal acceleration

Newton's 2nd Law for Rotational Motion

states that the angular acceleration of an object is directly proportional to the net torque and inversely proportional to the moment of inertia

net force

the vector sum of all the forces on an object

torque

a measure of how effectively a force causes rotation; is equal to the force times the lever arm

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