Question

prove that f'=ma(f'=sliding friction)

Answer 1

here's your answer mate !!

Answer 2

ⓢⓞⓛⓤⓣⓘⓞⓝ ⤵️

Let M is the mass of the object and it is moving at speed u. in the action of force in t time speed of the object increases up to v .

primary mass velocity=mu

final mass velocity=mv

Change of mass velocity=mv-mu

rate of change of mass velocity =mv-mu/t

=m(v-u)/t

Force is proportional to rate of change of mass velocity

F is proportional to m(v-u)/t

F is proportional to ma[a =v-u/t]

F=k.ma

though F=1,m=1 and a=1 then k=1

F=1×ma(putting the value of k)

F=ma

therefore F=ma [proved]