Circular Motion

Question 1

Define the radian

Answer 1

Angle subtended at the centre of a circle by an arc equal in length to the radius of the circle

Question 2

Angular displacement equation

Answer 2

Change in pheta = change in s / r
=distance around circle/ radius

Question 3

Angular speed equation (for complete cycle)

Answer 3

w =2pi / t
=2pi f

t=change in Time
f= frequency

Question 4

Linear speed equation

Answer 4

v= r w

r= radius
w = angular velocity

Question 5

Centripetal acceleration equations(2)

Answer 5

a = r w^2

a=v^2/r

Question 6

Centripetal force equations (2)

Answer 6

F = m r w^2

F = m v^2 / r