1ok thank you.......:)
a particle of mass m is moving in a circular path of constant radius r such that its centripetal acceleration 'a' is varying with time as a=k2rt2, whr k is a constant. the power delivered to the particle by the forces acting on it is:
a)2Ï€mk2r2t
b)mk2r2t
c)(mk4r2t5)/3
d)0
-
UP 0 DOWN 0 1 5
5 Answers
62v2/r = k2rt2
v=krt
v is time dependent.
Force acting in the direction of velocity is mdv/dt =mkr
power=f.v = mkr.krt = option b
62i dont know why.. i had a feeling that i had seen this question!