Chapter 2 Motion in a circle

Question 0

Angular speed

Answer 0

Angular speed, w, angular displacement per second.
Angular displacement 2 x pi x t x f

W=2pi/T

Question 1

Point on a perimeter of a wheel radius, r, rotating at a steady speed.
Circumference of wheel = 2 x pi x r
Frequency = 1/T

Answer 1

V= 2 pi r

T

Question 2

Centripetal acceleration

Answer 2

A = (v^2)/r

Question 3

Centripetal force

Answer 3

F = (mv^2)/r =m x w^2 x r