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A Girl on a Trampoline 
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#1
Nov606, 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. 


#2
Nov606, 05:43 PM

P: 180

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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