A parachute of mass 80 kg descends vertically at a constant velocity of 3.0 ms-1 takingacceleration of free fall as 10 ms-1, what is the net force acting on him?
Correct answer: B. Zero
- A. 800 N upwards?
- B. Zero
- C. 240 N downwards
- D. 360 N downwards
Explanation
Since force is found as the product of mass and acceleration, and acceleration in this case is 0 (as the parachute falls at a constant velocity) the force is 0.
This question appeared on the ETEA MDCAT 2015 paper, which you can sit online with every answer explained.
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