A rock is dropped from a bridge to the water below. It takes 3.20 s for...
A rock is dropped from a bridge to the water below. It takes 3.20 s for the rock to hit the water. What is the speed of the rock when it reaches the water?
Homework Answers
using the equation of linear motion we have
v = u + gt
where v = final velocity
u = initial velocity
t = time , g = acceleration due to gravity
v = 0 + 9.8*3.2
= 31.36 m/s
so the speed of rock when it reaches the water is 31.36 m/s
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