A student is standing on a frictionless sheet of ice when a small penguin slides
ID: 1632651 • Letter: A
Question
A student is standing on a frictionless sheet of ice when a small penguin slides into him and bounces off in an elastic collision as shown in the figure (arrows indicate direction of motion not magnitude of velocity). The student's mass is much larger than that of the penguin. After the collision, the magnitude of the penguin's momentum is: A. many times larger than the magnitude of the student's momentum. B. many times smaller than the magnitude of the student's momentum. C. about equal to the magnitude of the student's momentum. D. about twice as large as the magnitude of the student's momentum. E. about one half as large as the magnitude of the student's momentum.Explanation / Answer
Here ,
as before the collision , the total moementum was equal to zero
as there is no external force after the collision
the total momentum will be zero
hence , student must have equal and oposite momentum of the penguin
the correct option is C
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