Question

A fulcrum dividesa crowbar into ratio of 1:3. What weight will be lifted if an effort of 100 n is applied at the end of longer arm ?

Answer 1

The weight that can be lifted by an effort of 100 N at longer side will be 300 N

Explanation :

ratio of shorter arm: longer arm = 1 : 3

=> Load arm : Effort arm = 1 : 3

we know that ,

LOAD/ Effort =  Effort arm : Load arm

=> load/100 = 3 : 1

=> load = 300 N

Hence the weight that can be lifted by an effort of 100 N at longer side will be 300 N