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InterviewSolution
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A bullet shot with high velocity pierces through a window pane, whereas, the pane is shattered by a pebble thrown at it. Why? |
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Answer» A bullet moving with high velocity has a large momentum. When it strikes the window pane, the velocity decreases and momentum reduces to a very small value. This sudden change in momentum exerts a large impulsive force enough to pierce through the window pane, making a hole. On the other hand, the velocity of a pebble thrown at it is not very high, its momentum is less. So. change in momentum (or force) is less which only make cracks in the window pane. |
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