Question

The retarding force on the car is:​

Answer 1

Answer:

Let the car stops in S distnace

when force =F , then retardation on car a=

m

−F

the final velocity is 0

using V

2

−U

2

=2as also U=v ,V=0

we get v

2

=

m

2sF

...(1)

now let F

1

is applied to stop car in S distance with initial velocity U=3v ,we get

(3v)

2

=

m

2F

1

s

....(2)

from (1) and (2)

F

1

=9F

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