Question

Q. The physical quantities such as mechanical advantage and efficiency of machine has no units, but are pure numbers. Explain.

Answer 1

Answer:

A simple machine is a mechanical device that makes our life easier. ... of physical quantities, the mechanical advantage is unit less The efficiency of a machine is 50 %.

Explanation:

hope it helps you

Answer 2

Answer:

yes, it all pure numbers.

Explanation:

Because physical quantities like efficiency and mechanical advantage , if you check the formula same quantities are compared (divided).

Efficiency = output energy /input energy

which are same , so units get cancelled.

so it has unit.