Question

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Question is present in the attachment i want its solution as soon as.

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Thanks in advance

< ❎ > No bkhchodi, bakwaas in ans if you do so then i will report it.

Jai bajarang bali

@ Dr S.M.

Answer 1

Mass, m = 2kg
Initial velocity, u = 4 m/s
Final velocity, v = 0
Time, t = 2s

Acceleration, a = (v-u)/t = -2m/s^2

Friction acting on the body, f = ma = 2×(-2) = -4 N

To keep the body moving at constant velocity, net force should be zero

If you apply force F to keep the velocity constant,

Net force = 0

Or F + f = 0

Or F - 4 = 0

Or F = 4 N

You need to apply 4 N force


Note: Don't use harsh words in your question. If someone posts answers you don't like, you can always report it.

Answer 2

Hello !


Here is your answer !


Given information :

v = 0

u = 4 m/s

t = 2s

Using :

v = u + at

= 0 = 4 + 2a

= - 4 / 2 = a

Therefore :

a = - 2 m/s^2 [ Retardation ]

Now!

The force required will be :

f = mass × accleration

= 2 × 2 = 4N ( Opposing force )


Hope it helps !