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Question 1

Angular Kinematics

Answer 1

A force that causes angular motion =torque

Question 2

Torque

Answer 2

A force that is applied at a distance from the pivot point/ axis of rotation
-vector quantity has a magnitude and direction

Question 3

Newtons First Law of Linear Motion is

Answer 3

The Law of Inertia

Question 4

Angular Equivalent for Law of Inertia

Answer 4

It’s equal to moment of inertia: a bigger object will have a bigger mass

Question 5

Moment of Inertia

Answer 5

A quantity that describes angular inertia
-an objects resistance to change in angular momentum
-represents the resistance to angular acceleration based on mass and the distance the mass is distributed from the axis of rotation

Question 6

The heavier and longer an object is,

Answer 6

The more torque it can produce

Question 7

A humans moment of inertia about any axis is:

Answer 7

VARIABLE
-body is not a rigid object
-the limbs move relative to each other
-

Question 8

Distribution of mass along a vertical axis=

Answer 8

Small moment of inertia

Question 9

Distribution of mass along a short axis=

Answer 9

Large moment of inertia

Question 10

I= Zthing mk^2

Answer 10

I= moment of inertia about a given axis
Zthing m= summation of masses of the rotating segment
K= the segments mass distribution about the axis oof rotation

Question 11

Steps to Calculate Moment of Inertia

Answer 11

1. Calculate length of foot segment
2. Calculate mass of foot segment
3. Calculate radius of gyration of foot segment
4. Calculate moment of inertia of the foot segment

Question 12

Newtons 2nd Law of Motion

Answer 12

Acceleration (F=ma)
Angular Equivalent: T=Ia
T= net torque on a system
I= moment of inertia of a system
A= angular acceleration

Question 13

Newtons Third Law of Motion

Answer 13

Action- Reaction (Force/ reaction Force)
Angular equivalent: action-reaction (torque/ reactive torque)

Question 14

Net Torque

Answer 14

The effect of the sum of all torque vectores acting on a body is proportional to the change in angular velocity

Question 15

Angular Momentum

Answer 15

The quantity of angular motion possessed by a body
-in kg m^2/s

Question 16

Angular momentum is the product of

Answer 16

Moment of inertia and angular velocity

Question 17

Angular Momentum Equation

Answer 17

H= lw
H= angular momentum about an axis
I= moment of inertia about an axis
W= angular velocity about an axis

Question 18

Conserving Angular Momentum

Answer 18

Small I and large w
Large I and small w

Question 19

Linear Impulse

Answer 19

The product of force and the time over which it is applied is equal to the change in linear motion
F x T= change in mv

Question 20

Angular Impulse

Answer 20

The product of torque and the time over which it is applied is equal to the change in angular momentum
T x t= change in lw

Question 21

Newtons 3rd Law : Angular Equivalent

Answer 21

When 2 objects interact, the torque exerted by object A on object B is counteracted by a toqruw equal and opposite exerted by object B onto object A

Question 22

Torque Equation

Answer 22

T= F x r
T= torque
F= applied force in newtons
R= moment arm (radius) -depends on where torque/ force is applied

Question 23

Influence of a Moment Arm

Answer 23

Greater lever or moment arm= greater mechanical advantage