JEE Main Physics question
An 80 kg person is parachuting and experiencing a downward acceleration of 2.8 ms⁻². The mass of the parachute is 5 kg. The upward force on the open parachute from the air is (take g = 9.8 ms⁻²)
Answer: (A)
Solution
For the person + parachute system (total mass 85 kg), mg − F = ma ⟹ F = m(g−a) = 85(9.8−2.8) = 85 × 7 = 595 N.