Question

A car is moving on a levelled road and gets its velocity doubled.In this process :

1 how would kinetic energy of car changes?
2 how would potential energy of car will change?
3 how will momentum change ?give reasons
PLS FAST

Answer 1

The potential energy of the car remains same, since PE (= mgh) is independent of velocity.
(ii) The kinetic energy of the car becomes four times, since KE(=1/2 m ${{v}^{2}}$) j is proportional to square of velocity.
(iii) The momentum of the car will also get doubled, since momentum (p = mv) is proportional to velocity.