Question

A body of mass 1 kg undergoes a change of velocity of 4m/s in 4s what is the force
acting on it? ​

Answer 1

Given,

Mass of body = 1 kg

Change in velocity = 4m/s

Time = 4s

To Find,

Force acting on the body.

Solution,

By using the formula of force

Force = mass * acceleration

Now, we will find the value of acceleration

Acceleration = change in velocity/time taken

                      =  4/4

                      = 1m/s²

Now,

Force = 1*1

          = 1 N

Hence, the value of force acting on the body is 1 N.

Answer 2

Given:

mass of body m=1kg

change of velocity, v-u =4m/s

time, t=4sec

To Find:

Find the force, F

Solution:

We know that force F= mass × acceleration,

                             acceleration= change in velocity /time

∴                            Force , F = (mass × change in velocity)/time

   Now put the values,

                                          F= (1×4)/4

                                            =1kg-m/s²

                                            =1Newton

Hence the force acting on the body is 1 Newton.