3.6.1.1 Circular motion Flashcards
1
Q
What is centripetal acceleration?
A
The acceleration of an object moving in uniform circular motion, it is perpendicular to the direction of linear speed (points towards centre of circle)
2
Q
What is centripetal force?
A
In same direction as acceleration. Its the resultant force towards the centre of the circle required to keep a body moving in unform circular motion. (because F=ma)
3
Q
What is a radian?
A
The angle subtended by an arc of length S and radius
4
Q
What is angular speed?
A
The rate of change of angular displacement with respect to time.
5
Q
What is the formula for centripetal acceleration?
A
a=v^2/r=rѠ2=vѠ
6
Q
What is the formula for angular speed?
A
Ѡ =𐤃θ/𐤃t =v/r=2pif=2pi/T
7
Q
What is the formula for centripetal force?
A
F=mv^2/r=mrѠ^2=mvѠ
