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when the body was falling initially without opening parachute two force were acting, one gravitational force and other is friction force due to air resistance...... but when he open the parachute then force due to air resistance increase because force due to air resistance is directly proportional to velocity and area of body..... when velocity increases then a state comes where air friction is equal to force due to gravity, so acceleration of body is zero, means constan velocity is achieved.
so option 3 will be best possible answer amoung the all other options.
Plz like the answer
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