Work, Power and EnergyHard
Question
A car of mass 400 kg and travelling at 72 kmph crashes into a truck of mass 4000 kg and travelling at 9 kmph, in the same direction. The car bounces back at a speed of 18 kmph. The speed of the truck after the impact is :-
Options
A.9 kmph
B.18 kmph
C.27 kmph
D.36 kmph
More Work, Power and Energy Questions
A body of mass 5kg has momentum of 10 kg m/sec. When a force of 0.2N is applied on it for 10 sec, the change in its kine...The changes in momentum of a particle, when the kinetic energy is increased by 0.1% will be:-...The kinetic energy of an electron gets tripled, then the de Broglie wavelength associated with it will be 1/n times, whe...Sodium and copper have work functions 2.3 eV and 4.5 eV respectively. Then the ratio of the wave lengths is nearest to...Energy conservation law says that :-...