1. A bird is flying with a speed of 18.0 m/s over water when itaccidentally drop
ID: 1737613 • Letter: 1
Question
1. A bird is flying with a speed of 18.0 m/s over water when itaccidentally drops a 2.00 kg fish. Assumig the altitude of the birdis 5.40 m, and disregarding friction, what is the speed of the fishwhen it hits the water?Thank you very much for the help, please help me out with either ofthe two. I WILL RATE ASAP!!!!
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2. An olympic high jumper leaps over a horizontal bar. The jumper'scenter of mass is raised 0.25 during the jump. Calculate theminimum speed with which the athlete must leave the ground toperform his feat.
Explanation / Answer
1.) vi = 18 m/s, m = 2 kg, h = 5.4 m, g = 9.8m/s, Ki + Ui = Kf + Uf where K is kinetic energy and U ispotential energy. Ki = (m (vi^2))/2, Ui = mgh, Kf = (m(vf^2))/2, Uf = mg(0) = 0. Ki + Ui = Kf = m((vi^2)/2 +gh) so vf = ((vi^2) + 2gh)
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