﻿ A constant retarding force of 50 N is applied to a body of mass 20 kg moving initially with a speed of 15 ms–1. How long does the body take to stop? from Physics Laws of Motion Class 11 Manipur Board

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A constant retarding force of 50 N is applied to a body of mass 20 kg moving initially with a speed of 15 ms–1. How long does the body take to stop?

Retarding Force, F = - 50 N

Mass of the body, m = 20 kg

Initial velocity of the body, u = 15 m/s

Final velocity of the body, v = 0

Acceleration produced in the body can be calculated as:

F = ma

-50 = 20 x a

a =

Using the first equation of motion,

v = u + at

Time (t) taken by the body to come to rest can be calculated as,

Therefore,

t =

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