Recent content by mrl rao

Please refer to my first post. Attention , cupid.callin Sliding friction must be present as explained in the first post. Attention ,charger you are equating work done by 80 N to Change in Kinetic energy.This is wrong because you are neglecting friction the presence of which is explained in...

Kinetic energy K = 0.5 m v^2 =0.5 m (at^2)^2 which is a parabola.

By using Newtons second law (a = 80/6) and s = 0.5 a t^2 distance traveled is more than that given in the problem.This implies the presence of sliding friction.Therefore work done or work expended must be calculated by using W = Fs = 80(5) = 400 J.If you use other data as you have done in the...

Centre of gravity (cg) must lie in the front.The reason: In case of accident if the cg is in the front the car may rotate about the front axle so that part of the kinetic energy is converted into rotation (which may result in decompreession of rear suspension) about the front axle and part is...

A process which is irreversible is the one results in energy loss in the form of heat (dissipation) due to friction ,viscosity etc.As these are involved in processes other than natural ones- eg.,rubbing a stone againast a wall in vertically upward direction- irreversible processes need not be...