NTA Abhyas JEE Main2020PhysicsWork, Power and EnergyPractice
A particle is attached to a string and the other end of the string is attached to a fixed support. In order to just complete the vertical circular motion, what should be the ratio of the kinetic energy of the particle at its highest point to that at its lowest point?
Correct answer
0.2
Step-by-step solution
K.E = 1 2 m v 2 At lowest point in vertical circular motion V l = 5 r g and at highest point V h = r g ∴ K . E h K . E l = 1 5 = 0.2