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posted by  steeler on 7/4/2009 2:36:23 AM  |  status: Live  |  Earned Karma: 25

no. 2 show work and final answer

Course Textbook Chapter Problem Needs by
General Physics Physics (3rd) by Walker N/A N/A N/A
Question Details:
A diver runs horizontally off the end of a diving board with an initial speed of 2.75 m/s. If the diving board is 3.60 m above the water, what is the diver's speed just before she enters the water? (Neglect air resistance.)
1 m/s
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posted by JamesD on 7/4/2009 2:40:33 AM  |  status: Live
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I hope this helps! Best of luck with the rest of your coursework.
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posted by D.J84 (MNK) on 7/4/2009 7:40:58 AM  |  status: Live
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Response Details:
initial horizontal velocity of the diver=2.75
horizontal acceleration=0
horizontal velocity just before entering the water=2.75 m/s since horizontal acceleration=0

initial vertical velocity=0
vertical acceleration=g=9.8
vertical displacement=3.6
vertical velocity just before entering the water=v

v2=u2+2*g*h
v2=0+2*9.8*3.6
v=8.4 m/s

∴the speed just before entering the water==8.84 m/s
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