To Choose: The correct option.
Answer to Problem 4STP
D.
Explanation of Solution
Given:
The mass of the ice-skater,
The mass of the ball that is tossed towards skater,
Since the skater was at rest initially, thus the initial velocity of the skater,
After collision, ice-skater and ball moves together in a backwards, thus the final velocity of skater-ball is,
Formula used:
Momentum of an object of mass m and moving with velocity v is given by,
And, law of conservation of linear momentum: Momentum is conserved in a closed and isolated system and is given by,
Calculation:
Consider the ice-skater and ball as a system, then it will be a closed and isolated system and law of conservation of momentum can be applied to it.
Assume the backward direction as negative. Then the final speed of the skater and ball will be,
Let, the initial speed of the ball just before the skater caught it be
Using given values in above,
Negative sign denotes backward direction.
Conclusion:
Thus, the speed of the ball just before the skater caught it is
Chapter 9 Solutions
Glencoe Physics: Principles and Problems, Student Edition
Additional Science Textbook Solutions
University Physics Volume 2
Tutorials in Introductory Physics
Physics: Principles with Applications
University Physics with Modern Physics (14th Edition)
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