Question

A body of mass 3 kg retards uniformly from 40 m/s
to 10 m/s in 10 s. Find the retarding force.​

Answer 1

Answer:

Explanation:

Retarding force is calculated as follows:

F=mass x acceleration....(acceleration is change in velocity with time = 40-10)                                                                                                                           10

 = 3k(40-10)    =  3 x 30/10 =   3 x 3 = 9N

          10

Therefore the retarding force= 9Newtons

Answer 2

Answer:

Mass( m ) = 3 kg

Initial Velocity( u ) = 40 m/s

Final Velocity( v ) = 10 m/s

Time( t ) = 10 s

Explanation:

Acceleration, a= v-u/t

a = 10-40/10 = -3 m/s^2

Force, F=m×a

F = 3× -3 = -9N

Retarding Force = 9 N