Unit - 4.1 Simple Machine And Their Importance — PHYSICS STD 6 — Question
ICSE BoardEnglish MediumSTD 6PHYSICSUnit - 4.1 Simple Machine And Their Importance3 Marks
Question
The physical quantities such as mechanical advantage and efficiency of machine has no units, but are pure numbers. Explain.
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Answer
The physical quantities such as mechanical advantage and efficiency of the machine have no unit but are pure numbers. It is because these physical quantities are ratios of quantities that have the same units. These units cancel out each other. Therefore, physical quantities such as mechanical advantage and efficiency of the machine have no unit but are pure numbers.
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