Can anyone give the answer of this with explanation?
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sorry i can't help it for
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→ As soon as, the parachutist jumps off, he begins to fall under the gravity for first 10 seconds; that's why the curve of velocity time graph is increasing during that period of time.
→ Now, when he opens the parachute, due to air resistance his velocity becomes constant. So, the curve is parallel to the x-axis.( from 20th second onward).
→ Curve between 10 and 20 s is showing how the acceleration is decreasing.
POINT TO BE NOTED:
Between 10 and 20 second of interval, the graph is showing decreasing acceleration; its not retardation.
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