angular motion (principles 6 & 7)

Question 1

what is principle 6?

Answer 1

angular motion is produced by the application of a force acting at some distance from an axis; that is, by torque

Question 2

how can the magnitude of torque be calculated?

Answer 2

by using:
the magnitude of the applied force
the length of the lever arm
the angle at which the force is applied to the lever arm

Question 3

what is an example of principle 6?

Answer 3

throwing a curveball in baseball

Question 4

what is principle 7?

Answer 4

angular momentum is constant when an individual or object is free in the air

Question 5

what is an example of principle 7?

Answer 5

a trampolinist jumps up and down in preparation for their routine

Question 6

define angular momentum

Answer 6

the quantity of angular motion contained within an object or body

Question 7

define angular velocity

Answer 7

a quantitative expression of the amount of rotation that a spinning object undergoes per unit of time

Question 8

define moment of inertia

Answer 8

an object or body’s resistance to a change in its rate of angular rotation; the greater the distance of an object or body’s distribution of mass from the axis of rotation, the greater its moment of inertia