17 Motion in a circle Flashcards
1
Q
what is uniform circular motion?
A
motion of an object moving at constant speed along a circular path
2
Q
what is the formula for speed in a circle, v?
A
v = 2𝜋r/T
3
Q
what is angular displacement?
A
the angle an object in circular motion turns through
4
Q
what is angular speed?
A
the rate of change of angular displacement of an object in circular motion
5
Q
what is centripetal acceleration?
A
for an object moving at speed v, in uniform circular motion, its centripetal acceleration is a = v²/r = ω²r
6
Q
what is centripetal force?
A
the resultant force on an object that moves along a circular path
7
Q
what should you consider when looking at circular motion questions?
A
the directions of the weight, support/reaction force and the centripetal force
