Angular motion

Question 1

Angular motion

Answer 1

movement of a body in a circular path about an axis of rotation

Question 2

Principle axis of rotation

Answer 2

imaginary line that passes through the COM about which a body rotates

Question 2

Eccentric force

Answer 2

force is applied outside the centre of mass

Question 3

Concentric force

Answer 3

passes through the centre of mass

Question 3

Torque

Answer 3

measurement of how much turning force that is acting on a body and causing it to rotate

Question 4

Description of angular motion

Answer 4

• movement of a body part in a circular path about an axis of rotation
• created by applying an eccentric force to a body (external force passes outside centre of mass)
• torque is the measure of the turning force applied.
• body can rotate around 3 axis: longitudinal, frontal and transverse

Question 5

Newtons 1st law - Inertia - angular motion

Answer 5

a rotating body will continue to turn about its axis of rotation with constant angular motion unless an external rotational force is exerted upon it.

Question 6

Newtons 2nd law - Acceleration - angular motion

Answer 6

the rate of change of angular acceleration is proportional to the torque causing it

Question 7

Newtons 3rd law - action reaction - angular motion

Answer 7

when a torque is applied by one body to another , the second body will exert an equal and opposite torque on the other body

Question 8

Transverse axis

Answer 8

somersault
- pokes into each side of body

Question 9

Frontal axis

Answer 9

cricket bowl
- pokes in to front and back of body

Question 10

Longitudinal axis

Answer 10

spin or twirl
- pokes into top and bottom of body