An 80 kg person is parachuting and is experiencing a downward acceleration of 2.8 m s - 2 . The mass of the parachute is 5 kg. The upward force on the open parachute is (Take g = 9.8 m s - 2 )

Question

An 80 kg person is parachuting and is experiencing a downward acceleration of 2.8 m s - 2 . The mass of the parachute is 5 kg. The upward force on the open parachute is (Take g = 9.8 m s - 2 ), 595 N, 675 N, 456 N, 925 N

MARKS App · Accepted Answer

Mass of the person M = 80 kg Mass of the parachute m = 5 kg ∴ Total mass of the system = M + m = 85 kg Downward acceleration a = 2.8 m s - 2 Let upward force = F Applying Newton's II law of motion to this system F = m + M g - m + M a o r F = m + M g - a F = 85 9.8 - 2.8 N = 85 × 7 N F = 595 N

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