Circular Motion

Question 1

Define the radian

Answer 1

The angle subtended at the centerof a circle by an arc equal in length to the radius of the circle

Question 2

Formula that expresses angular displacement in terms of radians.

Answer 2

Theta = s/r where theta is the angular displacement

Question 3

What does angular speed tell us.

Answer 3

How fast something is rotating. Or the rate of change of angular displacement

Question 4

Formula for angular speed

Answer 4

w=theta/t

Question 5

Angular speed formula in relation to frequency and period

Answer 5

w=2(pi)f

Question 6

Formula that relates linear speed to angular speed

Answer 6

v=rw

Question 7

Explain why a force of constant magnitude is always perpendicular to the direction of motion and why it results in centripetal acceleration.

Answer 7

The force is directed inwards , direction of velocity keps on changing therefore acceleration present

Question 8

Formula for centripetal acceleration in terms of linear velocity

Answer 8

a=v (squared)/r

Question 9

What is needed to produce circular motion with constant angular speed

Answer 9

Centripetal acceleration

Question 10

Centripetal acceleration in terms of angular speed

Answer 10

a=w(squared)r

Question 11

2 equations for centripetal force

Answer 11

&=mv(squared)/r and F=mw(squared)r