Question

A bus is moving with a speed 72 kilometre per hour can be stopped by brakes after at least and metre what will be the minimum stopping distance if the same Embassy moving at a speed of 144 kilometre per hour

Answer 1

Answer:

40m.

Explanation:

Distance 2aS = v^2 - u^2, where v=final velocity, and u=initial velocity;

taking S = 10m, and u = 72km/h;

20a=0-5184

Therefore,

a = -5184/20= -259.2 m/s^2

So, when u = 144km/h,

2*259.2*S = 20736

and S = 20736/518.4

= 40m.

Hope this helps...

Answer 2

Answer:

answer in attachment ...... didn't quite get the distance part of the question as the question is not clear but the method to do is given in the attachment