Question

22. By applying the brakes without causing a
skid, the driver of a car is able to stop his car
with in a distance of 5 m, 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 of1)10 m 2) 2.5 m 3) 20 m 4) 40 m​

Answer 1

Explanation:

Here, d1=5m

u1=36 and v1=0.

so, 2as=v²-u².

a=−(36)²/10

now for new velocity

u2=72 and v2=0

so calculate the s from the same equation

Answer 2

Explanation:

Here, d1=5m

u1=36 and v1=0.

so, 2as=v²-u².

a=−(36)²/10

now for new velocity

u2=72 and v2=0

so calculate the s from the same equation