# physics

A diver springs upward with an initial speed of 2.58 m/s from a 3.0-m board. (a) Find the velocity with which he strikes the water.(b) What is the highest point he reaches above the water?

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1. h = 3.0 + 2.58t - 4.9t^2
h=0 when t=1.08883

v = 2.58 - 9.8*1.08883 = -8.09

max h(0.263) = 3.34

Hmm. the max height seems kinda low, given that he started at 3.0 m up. Better double-check my math.

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posted by Steve
2. Mr. Martin springs off a 5 meter high diving board with an upward velocity of 20 m/s.
A. Find Mr. Martin's height, velocity and acceleration after 0.5 seconds.

B. Determine when Mr. Martin will hit the water.

C. What is Mr. Martin's maximum height off the board?

D. What is Mr. Martin's maximum velocity when he hits the water?

E. What is Mr. Martin's velocity when he reaches half of his maximum height?

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posted by Thea

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