Question

Stopping distance of vehicles : When brakes are applied to a moving vehicle, the distance it travels before stopping is called stopping distance. It is an important factor for road safety and depends on the initial velocity (
v
0
) and the braking capacity, or deceleration, ?a that is caused by the braking. A car travelling at speed 72km/hr suddenly applies the brake with the deceleration of 5m/s2. Find the stopping distance of the car??​

Answer 1

Answer:

Velocity of moving vehicle=v

0

and decceleration =a

Final velocity of the vehicale =0 (As it stops)

Let the stopping distance be s

Then applying the third equation of motion we have:

v

2

=v

0

2

+2(−a)s

⇒0=v

0

2

−2as

⇒s=

2a

v

0

2

→ Expression for stopping distance.

MARK me brilliant please