motion in a circle

Question 1

Define the radian

Answer 1

One radian is the angle subtended at the centre of a circle by an arc of length equal to the radius of the circle

Question 2

Angular velocity ω

Answer 2

rate of change of angle θ

ω = θ/t

Question 3

equation for speed v for object moving in circulat motion

Answer 3

v = rω

Question 4

acceleration formulas for circlular motion

Answer 4

a = vω

a=rω²

a= v²/r

Question 5

define centripetal force

Answer 5

a force acting perpendicular to line of motion causing circular motion

Question 6

centripetal force equations

Answer 6

F = mv²/r

F = mrω²