A ball is rolled off the edge of a swimming pool and strikes the water 2.0 m away 0.30 second later. (a) What was the initial speed of the ball? (b) What is its speed when it struck the water?

Question

anonymous · Answer

You can use the first equation of motion, because you have

h = 2m distance traveled
t = .30 s
a = gravity

$$h = v_ot + \frac{1}{2} at^2$$

How could you think how fast the ball was moving given the initial velocity, time, and acceleration?