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**Figure 6 represents a block-and-tackle pulley system on which an effort of W Newtons supports a load of 120.0N. if the efficiency of the machine is 40****%, then the value of W is**

**A. 28.0N**

**B. 48.0N**

**C. 288.0N**

**D. 50.0N**

**QUICK ANSWER…**

**D**

**DETAILS…**** **** **

**This problem is a repeated question, ( 2018 JAMB-UTME physics question 10) we resolved it HERE**

**Now for the right answer to the above question:**

**A is not the right answer.****B is incorrect.****C is incorrect.****D is correct.**

**KEY-POINTS…**

**You may please note this/these:**

**Velocity ratio of a block and tackle pulley system is exactly equal to the number of pulleys in the machine.**

**You are free to add your own answers below this page to assist others improve their learning.**

**You can also click the golden ASK A QUESTION BOTTON down this page to raise new related questions… OUR COMMUNITY OF EXPERTS WILL BE MORE THAN HAPPY TO TACKLE IT…**

**/ culled from 2020 JAMB-UTME physics past question 34 /**