Question

a constant force acting in the body of mass 3 kg change its speed from 2m s-1
to 3.5 ms in 25s the direction of motion of the body remains unchanged what is the magnitude and direction of the force​

Answer 1

Answer:

Mass of the body, m = 3 kg

Initial speed of the body, u = 2 m/s

Final speed of the body, v = 3.5 m/s

Time, t = 25 s

Using the first equation of motion, the acceleration (a) produced in the body can be calculated as:

v=u+at

a=t(v−u)

   =25(3.5−2)=0.06m/s2

As per Newton's second law of motion, force is given as:

F=ma

    =3×0.06=0.18N