Use eergy conservalion to firid his speed just as he hils lhe waler if he just h
ID: 1572786 • Letter: U
Question
Use eergy conservalion to firid his speed just as he hils lhe waler if he just holds his nose and drops in A 72.0 kg swimnor jurmps into the cld swimming hole from tree limb that is 3.55 above tie water Exprees your answer to three significant figures Partc Use eneiy comsrvalion te find his spoed just as he hits the waler f he nariages tojup downward at 3 00 m/s Express your answer to three significant figures. Submit X Incorrect:; Try Again; 5 attempts remaining Not quite Check through your cakulalions, you may have made the wrong number ot signiticant hgures Submit Part B Use energy conservation lo fird his spuud lust as he hils lhe walor ir nbravely jumps straight up but ust beyand the board at 3 cid m/s Express your answer to three significant figures.Explanation / Answer
A) using law of conservation of energy
energy at the top = energy at the surface of water
(m*g*h) = (0.5*m*v^2)
m cancels
(g*h) = (0.5*v^2)
(9.81*3.55) = (0.5*v^2)
v = 8.34 m/s
B) using law of conservation of energy
energy at the top = energy at the surface of water
(m*g*h)+(0.5*m*u^2) = (0.5*m*v^2)
m cancels
(9.8*3.55)+(0.5*3^2) = (0.5*v^2)
v = 8.86 m/s
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