Question Answers

Sahay Sir > Question Answers > Cengage NEET by C.P Singh > Part 1 > Chapter 10 - COM, Momentum and Collision > Two balls are thrown simultaneously from top of tower in air as shown in the figure. (i) The acceleration of the center of mass of two balls while in air is equal to g. (ii) The path followed by the center of mass is parabola. (iii) The path followed by the center of mass will be vertical line if u1 sin alpha = u2 sin beta. (iv) The acceleration of the centre of mass will change if one ball after striking the ground comes to rest.

Two balls are thrown simultaneously from top of tower in air as shown in the figure. (i) The acceleration of the center of mass of two balls while in air is equal to g. (ii) The path followed by the center of mass is parabola. (iii) The path followed by the center of mass will be vertical line if u1 sin alpha = u2 sin beta. (iv) The acceleration of the centre of mass will change if one ball after striking the ground comes to rest.

A solid cylinder of mass 3kg is placed on a rough inclined plane of inclination 30^∘. If g=10ms^2 then the minimum frictional force required for it to roll without slipping down the plane is