Given that the mass is m = 82 kg.
For pushups,
The initial velocity is u = 0 m/s
The distance is 26 cm = 0.26 m
The time is

First, we have to find final velocity,

The acceleration can be calculated as

The force will be

The number of reps = 10
The work done will be

This is for one repetition.
For 10 repetitions the work will be

The time taken for 10 repetitions will be 14.64 s.
The power will be

For staircase,
Distance, d = 146 cm = 1.46 m
The time will be

The initial velocity is u = 0 m/s
The final velocity is

The acceleration will be

The force will be

The number of repetitions = 10
The work will be

For 10 repetitions, the work done will be

The time will be

The power will be

For squats,
The distance will be d = 21 cm = 0.21 m
The time will be

The initial velocity is u = 0 m/s
The final velocity will be

The acceleration will be

The force will be

The number of repetitions will be 10.
The work done will be

The work done for 10 repetitions will be

The time taken will be 14.43 s.
The power will be
