Question

When a car is stopped by applying brakes, it stops
after travelling a distance of 100 m. If speed of car
is halved and same retarding acceleration is applied
then it stops after travelling a distance of :-

(1) 25 m
(2) 50 m
(3) 75 m
(4) 100 m

Pls answer it quickly

Answer 1

Answer:

we use third equation of motion here. for first part, v.v-u.u=2a(100)...........(1) for second part, v.v -u.u/4=2as...........(2) from equation (1) and (2), s=25m

Answer 2

Answer: 50 meters

Explanation:

we know that ,

Speed = distance/time

so speed is directly proportional to distance .that is if speed is halved the distance will also be halved

so the answer is 50..