physics momentum test

axis of rotation

fixed point around which something turns, perpendicular to the rotation

angular displacement

the angle through which a point, line, or body is rotated in a specific direction and around a specific axis (change in arc length, distance from axis of rotation)

angular speed

the rate at which a body rotates about an axis (radians per second)

Angular acceleration

the rate of change of angular speed, constant for all points on a rigid object around a circle

tangential speed

the linear speed of an object directed along the tangent to the object’s circular path (tangent to the curve)

tangential acceleration

the instantaneous linear acceleration of an object directed along the tangent to the object’s circular path

centripetal acceleration

acceleration directed toward the center of a circular path

inertia

“force” that makes the object move outward from the rotation axis

torque

a quantity that measures the ability of a force to rotate an object around some axis

lever arm

perpendicular distance from the axis of rotation to a line drawn along the direction of force

center of mass

point at which all the mass of the body can be considered to be concentrated

moment of inertia

the measure of the resistance of an object to change in rotational motion