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A Girl on a Trampoline

by kenau_reveas
Tags: girl, trampoline
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Nov6-06, 04:58 PM
P: 39
A girl of mass m_1 = 60 kilograms springs from a trampoline with an initial upward velocity of v_i = 8.0 meters per second. At height h = 2.0 meters above the trampoline, the girl grabs a box of mass m_2 = 15 kilograms. View Figure

For this problem, use g = 9.8 meters per second per second for the magnitude of the acceleration due to gravity.

Part A
What is the speed v_before of the girl immediately before she grabs the box?
Express your answer numerically in meters per second.

Part B
What is the speed v_after of the girl immediately after she grabs the box?
Express your answer numerically in meters per second.
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Nov6-06, 05:43 PM
P: 179
This involves kinematics, to find the initial velocity, and conservation of momentum to find the velocity after she grabs the box.

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