Physics Help Forum Momentum problem

 Kinematics and Dynamics Kinematics and Dynamics Physics Help Forum

 Dec 4th 2016, 12:27 PM #1 Junior Member   Join Date: Nov 2016 Posts: 3 Momentum problem I tried to solve it from a few approaches: kinematics,energy conservation. but I know few things for sure. first you need to calculate the velocity in h.0 by using kinematics equations or energy conservation. then momentum conservation for the velocity of two of them and then kinematic equations or energy conservation for finding h.f. please help me I'm stuck . Attached Thumbnails
 Dec 4th 2016, 01:39 PM #2 Senior Member     Join Date: Aug 2008 Posts: 113 at height $h_0$, the acrobat will have a velocity of $v_1 = \sqrt{v_0^2 - 2gh_0}$ conserving momentum, the velocity, $v_2$, of the duo after the grab ... $v_2 = \dfrac{m_A}{m_A+m_B} \cdot v_1$ at the maximum height, $h_f$, the duo's velocity is zero ... $0 = v_2^2 - 2g(h_f-h_0)$ solve for $h_f$ topsquark likes this.

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