dwaynehaigler23 dwaynehaigler23

05-12-2020
Physics

contestada

A cannonball is launched straight upwards with a velocity of vi. If the cannonball reaches a height of 1.25 km, what was the launch speed?

Respuesta :

kk5996282 kk5996282

05-12-2020

Answer:

Explanation:

2aS=vf^2-vi^2

vf^2=2as+vi^2

vf^2=2*9.8*1.25*10^3+vi^2

vf^2=24500vi2

√vf2=√24500vi2

vf=156.5vi

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