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Question

# Suppose our scientific community had chosen force ,speed and time as the fundamental mechanical quantities instead of length,mass and time respectively and they chose the respective units if magnitudes 10N,100m/s and 1100s.Then the unit of mass in their system is equivalent to _________ in our system

A
103kg
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B
103kg
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C
10kg
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D
101kg
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Solution

## The correct option is B 10−3kgWe know that the force is defined as the rate of change of momentum. It can also be written as:F=mvtm=Ftv∴m=10N×1100s100m/sm=10−3kg

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