Wk 7 - Angular Kinetics

Question 1

moment of inertia (I) =

Answer 1

I = mr^2

Question 2

Symbol for moment of inertia is ….?

Answer 2

I

Question 3

linear momentum =

Answer 3

= mv

Question 4

Angular momentum (H) =

Answer 4

H = Iω or H = mk^2ω

Question 5

no ang vel in a body = no ____ _____

Answer 5

no ang momentum

Question 6

Angular impulse =

Answer 6

T x t

Question 7

Angular work =

Answer 7

T Δθ (change in ang distance)

Question 8

KE =

Answer 8

1/2 mv^2

Question 9

RKE (rotational) =

Answer 9

1/2 I ω^2

Question 10

Ang power =

Answer 10

Tω

Question 11

+ve mm action = _____ action

Answer 11

concentric

Question 12

-ve mm action = ______ action

Answer 12

eccentric

Question 13

What laws of motion are linear? (5)

Answer 13

• mass
• force
• momentum
• impulse
• acc

Question 14

What laws of motion are angular? (5)

Answer 14

• moment of inertia (I)
• torque
• ang momentum (H)
• ang impulse (Tt)
• ang acc

Question 15

Ang momentum is ____ with the ABSENCE of external torque

Answer 15

constant (cant take away ang momentum in air)

Question 16

The amount of ang acc you get is proportional to the _____ applied

Answer 16

torque

Question 17

_____ ____ is the force which prevents a whirling object from leaving its circular path

Answer 17

centripetal force (goes outwards)

Question 18

centripetal force =

Answer 18

Fc = mω^2r
OR
Fc = m vt^2/r

Question 19

Centrifugal force goes

Answer 19

inwards (centre fleeing)