Archive
16th of September 2015
Physics
Q:

A bird hit the windscreen of a fast moving car and fell on the bonnet. Which of the two, car or the bird, suffers greater change in momentum?

Shubh Labh - CBSE - Class IX

Tuesday, September 15, 2015 at 20:59:PM

A:

Hi Shubh,

Initially the bird's speed was less than the speed of the car.

After hitting the car, the bird falls on the bonnet of the car. Hence, we can say that the final speed of the bird becomes equal to that of the car.

However, the car is still travelling with the same speed. So, the bird undergoes larger change in speed than the car.

Hence, the bird suffers larger change in momentum than the car.

Wednesday, September 16, 2015 at 18:06:PM