Jack W.

asked • 02/25/22

Danielle jumps from a diving board 10 m above a pool. If her initial velocity (upwards) is 1ms^-1 , how long does it take her to reach the water? What is her velocity at this point?

I might sound dumb but I have not learned physics yet and someone is asking this question and I want to sound smart so what's the answer.

Luke J.

Is there any information on her horizontal speed? We won't be able to accurately define her speed, especially since Danielle needs horizontal speed to get off the diving board Or is there an angle of launch? We're missing that piece of crucial information to solve the problem
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02/25/22

1 Expert Answer

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Paul F. answered • 02/25/22

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This is a 1D projectile motion problem. You need the position equation to solve it.

s(t) = s0 + v0 t - 1/2 g t^2 g= 9.8 m/s^2

Time to splash = 1.534 sec from -4.9t^2 + t +10 = 0

Velocity at the water = 14 m/s from vf^2 = vi^2 + 2 g s = 1^2 + 2 (9.8) 10


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