potential energy at top = kinetic energy at bottom
m g h = (1/2)m v^2
so
h = v^2/(2g)
= 225/(2*9.81)
about 11 meters
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21 answers
A rock is thrown downward with an initial velocity of 30 m/s. What is the velocity of the rock after it reaches 225 meters
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A . What is the maximum height reached?
B.How long does the ball take to reach this maximum height ?
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A.What is the displacement?
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A ball is dropped from a bridge .It takes 4 s to reach the water below.
A .How high is the bridge above the water ?
B. What is the velocity of the ball at the end of 1.5 seconds ?
A .How high is the bridge above the water ?
B. What is the velocity of the ball at the end of 1.5 seconds ?
A stone is thrown vertically upward from the ground with an inital velocity of 10 m/s.
A.What is the maximum height reached?
B. How long does the ball take to reach this maximum height ?
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B. How long does the ball take to reach this maximum height ?
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