## Question

###### Johns Creek Physics 2018-2019 Impulse and Momentum Problem Solving 7.110 Part A Constants What was the...

Johns Creek Physics 2018-2019 Impulse and Momentum Problem Solving 7.110 Part A Constants What was the mass of stone 2? Two curling stones collide on an ice rink. Stone 1 has a mass of 16 kg and an initial velocity of 1.5 m/s to the north. Stone 2 was at rest initially. The stones collide dead center, giving stone 2 a final velocity of 0.69 m/s to the north Express your answer to two significant figures and include the appropriate units m2 Value kg Submit Previous Answers Request Answer X Incorrect: Try Again; 4 attempts remaining Part B What was the final velocity of stone 1? Express your answer to two significant figures and include the appropriate units Value Units Type here to search

## Answers

Collision Before collision m_1 = 16 kg u_1 = 1.5 m/s towards worth m_2 = ? u_2 = 0 After collision v_1 = ? v_2 = 0.69 m/s momentum conservation m_1 u_1 + m_2 u_2 = m_1 v_1 + m_2 v_2 (16 times 1.5) + 0 = 16 v_1 + m_2 (0.69) Assuming elastic collision (1) i.e V_saperation = V_apptoach V_2-V_1 = u_- u_2 0.69 - v_1 = 1.5 - 0v_1 = -0.81 m/s 24 = 16 times (- 0.81) + 0.69 m m_2 = 53.565 kg v_1 = -0.81 m/s -ve sign 0.81 m/s towards south

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