The paratrooper of mass 80 ππ descends vertically at a constant velocity of 3 π π β1taking the acceleration of free fall as 10 π π β2. Find out what is the net force acting on him?
Correct answer: A. Zero
- A. Zero
- B. 8.00 π upward
- C. 8.00 π downward
- D. 240 π downward
Explanation
The net force is zero because there is no acceleration. The strings of the parachute are pulling against him in the upward direction with a force equal to his weight which is equal and opposite to his weight due to the pull of gravity in the downward direction. If the velocity is constant, the acceleration is zero. Then by the newton's second law, the net force must be zero.
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