rotational motion

Question 1

angular speed

Answer 1

rate at which a body rotates around an axis

Question 2

angular acceleration

Answer 2

rate of change of angular speed

Question 3

tangential speed

Answer 3

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

Question 4

centripetal acceleration

Answer 4

acceleration directed toward the center of the circular path

Question 5

force

Answer 5

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

Question 6

torque

Answer 6

the amount of force needed to push something about an axis

Question 7

center of mass

Answer 7

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

Question 8

moment of inertia

Answer 8

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

Question 9

tangential speed is greater where?

Answer 9

outside of circle

Question 10

an object will fall over if its center of gravity is

Answer 10

not over an area of support

Question 11

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

Answer 11

most of the mass is far removed from the rotational axis

Question 12

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

Answer 12

torque that acts on it

Question 13

rotational equilibrium

Answer 13

the net torque must be zero

Question 14

counterclockwise

Answer 14

positive

Question 15

clockwise

Answer 15

negative

Question 16

lever arm

Answer 16

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