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\includegraphics[max width=\textwidth, alt={}, center]{d3bb6702-231d-42a0-830e-9f844dca78d7-2_748_1410_979_370}
The velocity-time graph shown models the motion of a parachutist falling vertically. There are four stages in the motion:
- falling freely with the parachute closed,
- decelerating at a constant rate with the parachute open,
- falling with constant speed with the parachute open,
- coming to rest instantaneously on hitting the ground.
- Show that the total distance fallen is 1048 m .
The weight of the parachutist is 850 N .
Find the upward force on the parachutist due to the parachute, during the second stage.