two masses ma 4.8 and mb collide in a totally in elastic collision ma initial sp
ID: 1410487 • Letter: T
Question
two masses ma 4.8 and mb collide in a totally in elastic collision ma initial speed 7.2 m/s mb initial speed -3.6 m/s. a. what is the speed and direction of the combined mass after collision b. what is the initial and final kinetic energy c. what percentage of kinetic that was lost in the collision? two masses ma 4.8 and mb collide in a totally in elastic collision ma initial speed 7.2 m/s mb initial speed -3.6 m/s. a. what is the speed and direction of the combined mass after collision b. what is the initial and final kinetic energy c. what percentage of kinetic that was lost in the collision?Explanation / Answer
Conservation of linear momentum
Mass of A is 4.8kg and that of B is 1 Kg
7.2*4.8 -3.6 = v (5.8)
v = 5.33 m/s
Initial Kinetic energy = 2.4 *7.2*7.2 + 0.5 *3.6*3.6 = 131 J
Final = 1/2 * 5.8 * (5.33)^2 = 82.4
THe percentage change will be = 37%
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