Question

a car masses 150 kgcomes to rest on applying brakes for 5 seconds . the force applied by the brakes is 95N .what was the intial velocity 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.