Rotational Motion & Torque

Question 1

Inertia

Answer 1

tendency for an object to continue to remain at rest or
in constant motion

Question 2

Rotational Inertia

Answer 2

(or angular inertia) tendency for an object to continue to rotate

Question 3

Moment of Inertia

Answer 3

(I) a quantitative measure of the rotational inertia of an object. Units kg m^2

Question 4

Moment of Inertia for a point amss

Answer 4

I = mr^2

Question 5

Torque

Answer 5

(T) is a vector quantity that measures the effectiveness of a force in causing rotation. Units: 1Nm

Question 6

Is Torque interchangeable with Energy and Work?

Answer 6

Hell no

Question 7

Axis of Rotation

Answer 7

Point around which an object rotates

Question 8

Fulcrum (or pivot)

Answer 8

Point around which a lever pivots

Question 9

Lever Arm

Answer 9

Distance from axis of rotation that a force is applied, causing torque.

Question 10

Rotational Equilibrium

Answer 10

When all of the torques on an object cancel each other’s effects and the object rotates with constant angular velocity or not at all.

Question 11

Line of action

Answer 11

The line that the Force makes on a lever.

Question 12

What Torque equation does Newtons 2nd Law give us?

Answer 12

Tnet=Ia

Question 13

Counter-clockwise has what sign?

Answer 13

Positive

Question 14

Clockwise has what sign?

Answer 14

Negative

Question 15

Is Torque “felt”?

Answer 15

No the force is what one experiences

Question 16

What is the slope of an angular position vs. time graph?

Answer 16

Angular velocity

Question 17

Angular Momentum

Answer 17

(L) is a vector quantity from the product of the moment of inertia and angular velocity. It is conserved.

Question 18

Describe MOI and Angular velocity for a person spinning with their arms out

Answer 18

High Moment of Inertia, Low Angular velocity

Question 19

Describe MOI and Angular velocity for a person spinning with their arms in.

Answer 19

Low moment of Inertia, High angular Velocity