A constant force acting on a body of mass 3.0 kg changes its speed from `2.0 m s^-1`to `3.5 m s^-1` in 25 s. The direction of the motion of the body remains unchanged. What is the magnitude and direction of the force ?

Explanation

`m= 3kg implies u= 2ms^(-1) implies v= 3.5 ms^(-1)`
`t= 25 s implies F=?`
`F= m((v-u))/(t)= (3 xx (3.5-2))/(25)= (4.5)/(25)= (45)/(25 xx 10)= 0.18 N` and direction of force remains same (unchanged)