posted by Kali on .
The best leaper in the animal kingdom is the puma, which can jump to a height of 3.7 m when leaving the ground at an angle of 45°. With what speed must the animal leave the ground to reach that height?
the potential energy at the top of the leap is equal to the (vertical) kinetic energy at the start
m * g * h = .5 * m * [v * sin(45º)]^2
the m's cancel
(2 * g * h) / [sin(45º)]^2 = v^2
g = 9.8 m/s^2
145 = v^2
What minimum speed does a 170 puck need to make it to the top of a 3.5 -long, 23 frictionless ramp?