Question

Calculate the change in momentum of a body weighing 5kg when its velocity decreases from 20m/s to 0.2m/s

Answer 1

Step-by-step explanation:

change in momentum = mv2- mv1

= 5×20-5×0.2

= 99kg.m/s

Answer 2

Answer:

-99kgm/s

Step-by-step explanation:

U=20m/s

V=0.20m/s

M=5kg

final momentum=mv

                         5*0.20

                        =1.00

initial momentum=5*20

                            =100

change in momentum=mv-mu

                                    =1-100

                                    =-99kgm/s