Question 1 :
320=1/2 x 9,81 x T2
320 x 2=9,81 x T2
640=9,81 x T2
T=√640/9,81
T=8
The time that will take a man who jump out from the top of the eiffel tower to reach the ground will be of approximately 8s.
Question 2 :
S=9,81 x 602 x ½
S=(9,81 x 3600)/2
S=35316/2
S=17658
If you want to fall in 1 minute, you must be at 17658 m of the ground or 17,658 km.
Question 3 :
I think that it was possible on this planet but ti will be very difficult.
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