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.
a) Show that the total distance fallen is $1048{\text{ }}m$.
The weight of the parachutist is $850{\text{ }}N$.
b) Find the upward force on the parachutist due to the parachute, during the second stage.

پاسخ تشریحی :
تحلیل ویدئویی تست
تحلیل ویدئویی برای این تست ثبت نشده است!