Collision-Physics-Exam Solution, Exams of Physics

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8.01 Exam4t3 Sylutione "*"S Name: Problem 1: Collision (15 Points) Two masses M and 3M collide on a horizontal frictionless surface as shown. Before the collision the mass M has a velocity V; in the y-direction. The mass 3M has a velocity 3Vo making an angle 6 to the x-axis as shown. Assume sind = 3/5 and cos = 4/5. After the collision the mass 3M is at rest. The mass M moves along the x-axis with the velocity Vj. Neglect gravity. Give all your answers to parts b), c), and d) in terms of M and Vo. Be careful do not confuse your symbols. a) What are the x and y-components of the net linear momentum before the collision in terms of M, Vi, Vo and 6? b) What is the speed V; of the mass M before the collision? c) What is the speed V;, of the mass M after the collision? ‘ d) What is the velocity of the center-of-mass? tet 3m 5, V. a) Po = aImZy en Onse ={~v,| __ fen. “I- ---- mex a | | 1 tot - , 3 AVY - ime Vy sme Lv Betore . \ =Mmv, e 3 my, t docsity.com