1) Throw a small ball (best a golf ball) straight upward as hard as you can. You

Question

1) Throw a small ball (best a golf ball) straight upward as hard as you can. Your friend can measure the time of flight of the ball using a stop watch. Find the initial speed of your throw and the approximate maximum height of the ball solely with the use of the measured time. Please write here the equations you are using:

Here are my time measurements: 1.19s, 1.44s, 1.3s, 1.3s,1.5s

I need to find Velocity (speed) and maxium height of the throw

) What happens when you throw the ball at some angle other than 90o?

Does this change the time of flight? Explain.

Can you still determine the maximum height and the initial speed? Explain.

Explanation / Answer

As, Time of flight = 2u * sin(theta)/g

Thus, when you throw the ball at some angle other than 90o , time of flight changes .

Range of flight = u2 * sin2(theta)/g

Height of flight = u2 * sin2(theta)/2g

Thus, both maximum height and the initial speed can be calculated .

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