Circular Motion A2

Question 1

What is 1 rad ?

Answer 1

It is the angle subtended at the centre of a circle when arc length is equal to the radius

Question 2

Formulas in circular motion (basics)

Answer 2

Speed = 2πr/T or 2πrf
Angular speed = 2π/T
V= rw
a= v²/r a= rw²
F= mv²/r F= mrw²

Question 3

For horizontal circle what does angle depend on ?

Answer 3

Tan∅= v²/rg so the angle depends on radius , velocity but not mass

Question 4

For verticle circle

Answer 4

Top to bottom : feels light
Bottom to top : feels heavy
V= √rg