A body of mass `5kg` is acted upon by a variable force. The force varies with the distance covered by the body as shown in figure. What is the speed of the body when it has covered `25m`? Assume that the body starts from rest.

Explanation

Here, `m=5kg, upsilon=?, s=25m, u=0.` From Fig.
`F=10N`
`a=(F)/(m),a=(10)/(5)=2m//s^(2)`
As `upsilon^(2)-u^(2)=2as`
`upsilon^(2)=u^(2)+2as=0+2xx2xx25=100`
`upsilon=sqrt(100)=10m//s`