Work Done By Constant Force

A body of mass 3 kg is under a constant force which causes a displacement s in metres in it, given by the relation s = $\frac{1}{3}$ t², where t is in sec. Work done by the force in 2 sec is:

1. $\frac{5}{19}J$

2. $\frac{3}{8}J$

3. $\frac{8}{3}J$

4. $\frac{19}{5}J$

A uniform force of newton acts on a particle of mass Hence the particle is displaced from the position metre to the position metre. The work done by the force on the particle is:
1.
2.
3.
4.