Circular Motion 5.2

Question 1

What is the definition of a radian?

Answer 1

-One radian is defined as the angle subtended at the centre of a circle when the arc is equal in length to the radius of the circle

Question 2

What is the period and Angular velocity?

Answer 2

-Period: time taken in seconds for one complete circular path
-Angular velocity: the rate of angular rotation, measured in radians per second

Question 3

What is the centripetal acceleration?

Answer 3

-The acceleration of an object moving with uniform circular motion, it is directly radially inwards perpendicular to the velocity at any instant.

Question 4

How many degrees is π(3.16) radians?

Answer 4

180 degrees

Question 5

What is an equation for the speed of a body moving in a circle involving the circumference?

Answer 5

v=2πr/T

Question 6

What is the equation for Angular velocity involving frequency?

Answer 6

ω=2πf

ω= angular velocity