Question Answers

Sahay Sir > Question Answers > Cengage JEE Mains Physics by B.M Sharma > Chapter 7 - Work, Energy and Power > Figure shows a smooth vertical circular track AB of radius R. A block slides along the surface AB when it is given a velocity equal to 6gR−−−−√ at point A. The ratio of the force exerted by the track on the block at point A to that at point B is

Figure shows a smooth vertical circular track AB of radius R. A block slides along the surface AB when it is given a velocity equal to 6gR−−−−√ at point A. The ratio of the force exerted by the track on the block at point A to that at point B is

A person of mass 70kg jumps from a stationary helicopter with the parachute open. As he falls through 50 m height he gains a speed of 20 ms^−1. The work done by the viscous air drag is