A unuform rod of mass 100g has a length a 1m.it is supported horixontally on two knife edges placed 10cm from its end. what will be the reactions at thise supports when a 50g mass is suspended 30cm from one of the knife edges?

Answer 1

F1 + F2 = 100 + 50 = 150
take moments about knife 1 for example
F2 * 90 = 100 * 40 + 50 * 30 = 5500
so
F2 = 5500/90 = 61.1
F1 = 150 - 61.1 = 88.9