Circular Motion Flashcards
1
Q
What is one radian?
A
The angle subtended at the center of a circle by an arc of length equal to the radius of the circle i.e arc length = radius at 1r
2
Q
Length of Arc
A
Angle x radius
3
Q
Formula for acceleration.
A
a=vω
OR
a=v²/r
4
Q
Formula of speed
A
v=ωr
4
Q
In which direction is acceleration?
A
Towards the center of the circle.
4
Q
Why does speed of the object in the circular path remain constant?
A
The centripetal force acts towards the center of the circle, which is 90⁰ to the speed. So it has no component in the direction of speed.
5
Q
Formula for centripetal force.
A
F=mv²/r
OR
F=mrω²
