SOLUTION: Josey drops a rock off a 100 meter cliff.
a) How long will it take for the rock to reach the ground?
b) What will be the impact velocity of the rock?
Algebra.Com
Question 1163768: Josey drops a rock off a 100 meter cliff.
a) How long will it take for the rock to reach the ground?
b) What will be the impact velocity of the rock?
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
s=(1/2)at^2
s(m)=(1/2)(9.8m^2/sec^2)*t^2 (sec^2)
200/9.8=t^2=20.41
t=sqrt(20.41)=4.52 seconds
v=sqrt(2gh)=sqrt(2*9.8 m/sec^2*100m) units are going to be m/sec
v=44.27 m/sec
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