Question

A drop of mass 2.0 g falls from a cliff of height 1.0 km. It hits the ground with a speed of 50.0 m/s. The work done by resistive force is
1. -10j
2. -12.50j
3. -15.5j
4. -17.50j
solution:- I think change in kinetic energy can give me work done. B
ut how to get resistive force.