Question

By applying the brakes without causing the skid the driver of a car is able to stop his car within a distance of 5 metre if it is going at 36 kmph, if the car were going at 72 kmph using the same brakes he can stop the car over a distance of​

Answer 1

hey !! bro the answer is 10m

<explanation---

since ,in 36kmph car stopped at a distance of 5m

therefore In 1 kmph car stopped at a distance of 5/36 m

and then ln 72 kmph using the same brakes the car stopped at a distance of 5/36*72= 10 m

I hope u understand...

Answer 2

We know that ,

W=change in K.E

change in K.E1/change in K.E2

=W1/W2=FS1 /FS2

I.e 36/72 =5/S2

I.e 1/2 =5/S2

Therefore,S2 = 10