- #1
steveandy2002
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Homework Statement
a balls inital velocity is 72 km/ph and falls 100 meters with gravity @ 10 meters per second and i need to work out the time it takes to fall to ground. i was given s=ut+0.5*gt^2
Homework Equations
s=ut+0.5gt^2
v^2=u^2+2as
t=(v-u)/a
The Attempt at a Solution
v2=u2+2as
v=squr u^2+2as
v=squr 20^2+2*10*100
v=48.98979486
t=(v-u)/a
t=(48.98979486-20)/10
t=2.898979486 seconds
100=20*2.898979486+0.5*10*2.898979486^2
is this correct??
and is there a way to do this with just the s=ut+0.5at^2 formula ?
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