Question

Think and Solve 3.55 Review PartA Jeannie Beanie (mass 35 kg ), standing on 15 kg ), who leapt into her arms after running across an adjacent field at 2.4 m/s ce, catches her leaping dog, Daisy (mass Use the conservation of momentum to find the speed of Jeannie and her dog after the catch Express your answer to two significant figures and include the appropriate units. USI Value m/s Submit Request Answer Provide Feedback

Answer 1

Jeannie mass = 35 kg daisy mass = 15 kg m_1 = 35 kg m_2 = 15 kg u_1 = 0 u_2 = -2.4 m/s v_1 = v v_2 = v After Jeannie catches the dog they both move with the same velocity P_before_= P_after or, m_1 u_1 + m_2 u_2 = m_1 v_1 + m_2 v_2 or, 15 times (-24) = (35 + 15)v v = -2.4 times 15/50 = -0.72 ms^-1 speed of Jeannie and her dog = -0.72 ms^-1