A person (regardless of height) can fall freely from a height of 1000 meters to find the instantaneous velocity and time required when falling to the ground

A person (regardless of height) can fall freely from a height of 1000 meters to find the instantaneous velocity and time required when falling to the ground

People, 1000 meters high, free fall. Dangerous
v²=2gh,
v=√(2gh)=……
h=1/2 gt² ,
t=√(2h/g)=……

How long does it take for a parachute to reach the ground at an acceleration of 5 meters per second from 1000 meters``
Senior one physics will do it. Thank you

According to s = 0.5at
T = radical (2H / a) = radical (2 * 1000 / 5) = 20s

When t = 0, a sandbag with mass m is released from the balloon, regardless of the air resistance of the sandbag=______ When the balloon stops descending, the speed of the sandbag is______ (the sandbag is not on the ground yet)

According to Newton's second law: Mg = (M-M) a: a = MGM − m, then the time to stop is t = v0a = V0 (m − m) mg. At this time, the speed of sandbag: v = V0 + GT solution: v = mv0m, so the answer is: v0 (m − m) mg; mv0m