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Second Law of Motion

A parachutist...

Question

A parachutist along with the parachute has a mass of 75 kg. He jumps from a large height and is coming down with a uniform velocity with the parachute fully opened. The magnitude of force due to the air resistance is: ( take g $= {10 m / s}^{2}$ ).

A

z e r o

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B

< 750 N

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C

> 750 N

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D

750 N

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Solution

The correct option is D $750 N$
The downward force on the parachute is $m g = 750 N$ . Since he is coming down with a uniform velocity that means the downward force is balanced by the upward force due to air. So, the force due to the air resistance is equal to $750 N$ .

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