Basic Physics Question

[YesINeedhelp]

IF a man jumps off a building that is 90 m high, and gravity is 9.8 m/s, and he weighs 80 kg, then what will his velocity be just as he hits the ground?

 

[warmfire540]

just use the equation

vf^2=vi^2 +2ax
vf^2=0+2(9.8)(90)
vf^2=1764
v=42 m/s

weight is irrelevant