A parachutist with a mass of 80 kg is falling at 55km/h when her parachute opens. She then falls 24 m in the next 2 s. What is the force of air resistance acting on the parachute during those 2 s?
This is the velocity at the time of parachute opens.
Take this moment as
There will be acceleration due to gravity '
So the effective acceleration will be
Here initial velocity is
Solving this we get the value of
The force of air resistance will be