The paratrooper of mass 80 kg descends vertically at a constant velocity of 3.0 ms-¹ . Taking the acceleration of free fall as 10 ms-¹ find out what is the net force acting on him? (g=10ms-²)
Correct answer: A. Zero
- A. Zero
- B. 800 N upward
- C. 800 N downward
- D. 24 N downward
Explanation
The net force is zero bcz there is no acceleration. The strings of 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 pull of gravity downward.
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