Question

Assertion (A): Mechanical advantage (MA) of a simple machine is always greater than one.

Reason (R): $MA=\frac{Load}{Effort}$

• A. A and R are true and R is the correct explanation of A.
• B. A and R are true, but R is not the correct explanation of A.
• C. A is false but R is true.
• D. Both A and R are false.

Answer 1

The correct option is C

A is false but R is true.

The explanation for the assertion statement

1. The mechanical advantage of the lever is defined as the ratio of load to the effort or effort arm to the load arm.
2. The mechanical advantage of the third-class lever is less than one.
3. Hence assertion is false.

The explanation for the reason statement

1. The mechanical advantage of the lever is defined as the ratio of load to the effort or effort arm to the load arm.
2. It is given as $MA=\frac{Load}{Effort}$
3. Hence reason is true.

Hence the correct option is (C) A is false but R is true.