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.

Answer 2

Answer:

Explanation:We cannot use a metallic wire as a fuse wire because its temperature will not rise faster than the connecting copper wire and we have to use the low melting point material