A dolphin is trying to jump through a hoop that is fixed at a height of 3.5 m above the surface of her pool. The dolphin leaves the water at an angle of inclination of 40°. Determine the minimum speed the dolphin will need when leaving the water in order to reach the height of the hoop.

Question

Jessie Blevins

19 September, 10:40

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Natalee Walton · Answer 1

Vertical speed u = v sinФ

Energy is conserved:

E = mgh = 1/2mu²

u = √ (2gh)

v = √ (2gh) / sinФ

g = 9.81 m/s²

h = 3.5

Ф = 40°