Chapter 10.2, Problem 33SSC

To determine

Whether the MA and IMA increase, decrease or remain the same if the efficiency of a simple machine increases.

Answer to Problem 33SSC

Any case is possible, that is MA and IMA can decrease, increase or even remain the same depending upon the case one is considering.

Explanation of Solution

Introduction:

The efficiency of a machine is the ratio of mechanical advantage and ideal mechanical advantages,

  $e=\frac{MA}{IMA}\times 100$

Now, if the efficiency of the machine increases, then there are following possible cases,

1. MA increases while IMA remains constant.
2. MA remains constant while IMA decreases.
3. MA increases while IMA decreases.
4. Both MAand IMA increases but increase in MA is more as compared to IMA .
5. Both MAand IMA decreases but decrease in IMA is more as compared to MA .

Conclusion:

Thus,if the efficiency of the simple machine increases, then MA and IMA can increase, decrease or even remain same depending upon above mentioned cases.