Load Arm

Q.

Class III levers have mechanical advantage less than one. Why are they then used?

1. To obtain gain in speed

2. To obtain loss in speed

3. It acts as force multiplier

4. It is used in raising a load

Q.

Class III levers have mechanical advantage less than one. It cannot be used:

1. To obtain gain in speed

2. To obtain loss in speed

3. It acts as force multiplier

4. It is used in raising a load

Q. Why is the mechanical advantage of lever of the thread class always less than one? Give one example of this class of lever

Q. Class III levers with M.A. < 1, are:

1. Force multipliers
2. Speed multipliers
3. Time multipliers
4. Easy to handle

Q.

State the kind of lever which always has the mechanical advantage less than $1$.

1. $ClassI$
2. $ClassII$
3. $ClassIII$
4. None of the above

Q. To use a machine as a force multiplier what class of lever should be preferred? Draw a sketch of such a lever

Q. Write the relationship between mechanical advantage, load and effort.