Class 3 Lever

Q.

The mechanical advantage of a simple machine is given by the ratio of

1. load to effort

2. load arm to effort arm

3. effort to load

4. none of these

Q.

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

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

1. A and R are true and R is the correct explanation of A.

2. A and R are true, but R is not the correct explanation of A.

3. A is false but R is true.

4. Both A and R are false.

Q.

Calculate the mechanical advantage of a lever when load = $200N$ and effort = $80N$.

Q.

Mechanical advantage of a lever is given by

1. $\frac{\mathrm{effort}\mathrm{arm}}{\mathrm{load}\mathrm{arm}}$

2. $\frac{\mathrm{load}\mathrm{arm}}{\mathrm{effort}\mathrm{arm}}$

3. load arm x effort arm

4. load arm + effort arm

Q.

Define mechanical advantage