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College Physics

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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?
_____m/s

  • College Physics -

    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

  • College Physics -

    What minimum speed does a 170 puck need to make it to the top of a 3.5 -long, 23 frictionless ramp?

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