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MrRa [10]
3 years ago
10

A basketball player throws a ball at 60° to the horizontal at a net 4.0m away. The height of the net is 3.3m. The ball leaves hi

s hands at a height 2.0m from the ground. What is the initial speed of the ball?
Th pic above is my ans, but it's quite wierd. So if it's wrong, what is the correct ans, and why my ans is wrong(what mistakes i did). Thanks

Physics
1 answer:
Hoochie [10]3 years ago
4 0
Excellent work!
Your calculations are correct, but near the end, you have forgotten to cancel u.  If you cancel the u, the linear term becomes a constant, and the resultant equation becomes a simple quadratic which is much easier to solve.
I get u=7.468 m/s using g=9.81 (as you did)
You will rework and should get 7.468 m/s as well.

Congrats for the good work!

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8 0
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A visitor to a lighthouse wishes to determine the height of the tower. She ties a spool of thread to a small rock to make a simp
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To solve this problem we must rely on the equations of the simple harmonic movement that define the period as a function of length and gravity as

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