Block 1, of mass m_1, moves across a frictionless surface with speed u_i. It col
ID: 2205900 • Letter: B
Question
Block 1, of mass m_1, moves across a frictionless surface with speed u_i. It collides elastically with block 2, of mass m_2, which is at rest (v_i = 0). After the collision, block 1 moves with speed u_f, while block 2 moves with speed v_f. Assume that m_1 > m_2, so that after the collision, the two objects move off in the direction of the first object before the collision.
What is the final speed, u_f of block 1? Express u_f in terms of m_1, m_2, and u_i
What is the final speed, v_f of block 2? Express v_f in terms of m_1, m_2, and u_i
Explanation / Answer
(u_f = rac{u_i(m_1-m_2)}{m_1+m_2}) (v_f = rac{2m_1u_i}{m_1 + m_2})