A truck traveling due north at $50 k m / h r$ turns west and travels at the same speed. What is the change in magnitude of speed?

0

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100

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5

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50

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Solution

The correct option is B $0$
When the direction is changed then velocity changes but the speed or magnitude of velocity remains constant.
In this case, the truck changes only the direction of motion, not the magnitude.
So change in the magnitude of velocity is zero.

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