Year: 2015
Topic: Work, Energy, and Power
Time :
1. A particle of mass m is driven by a machine that delivers a constantpower k watts. If the particle starts from rest the force on the particle attime t is
(1). \({\sqrt{2mkt}}^{\frac{−1}{2}}\)
(2). \(\frac{1}{2}{\sqrt{mkt}}^{\frac{-1}{2}}\)
(3). \({\sqrt{\frac{mk}{2}t}}^{\frac{−1}{2}}\)
(4). \({\sqrt{mkt}}^{\frac{−1}{2}}\)