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Flashcards in rotational motion Deck (16)
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1

angular speed

rate at which a body rotates around an axis

2

angular acceleration

rate of change of angular speed

3

tangential speed

instantaneous linear speed of an object directed along the tangent to the object's circular path

4

centripetal acceleration

acceleration directed toward the center of the circular path

5

force

net force on an object directed toward the center of the objects circular path, maintains the objects circular motion

6

torque

the amount of force needed to push something about an axis

7

center of mass

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

8

moment of inertia

the tendency of a body rotating about a fixed axis to resist a change in rotational motion

9

tangential speed is greater where?

outside of circle

10

an object will fall over if its center of gravity is

not over an area of support

11

the rotational inertia of an object about a particular axis is greater when

most of the mass is far removed from the rotational axis

12

a good inclination of why a ball gains speed as it rolls down an incline involves the

torque that acts on it

13

rotational equilibrium

the net torque must be zero

14

counterclockwise

positive

15

clockwise

negative

16

lever arm

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