In order to weight a boy in the laboratory a uniform plank of wood A B 3.0m long, having a mass of 8.0kg is pivoted about a point 0.5m from A .the boy stands 0.3m from A and a 2.0kg mass is placed 0.5m from B in order to balanced the plank horizontal. Calculate the mass of the boy.

Answer 1

I don't know it !!!!!! Why will i ask if I know it

Answer 2

Can you teach me

Answer 3

I don't know how to solve this question so please send me the solution

Answer 4

20kg and reaction is 300N.

Answer 5

တွက်ပေးပါလား

Answer 6

NO?

Answer 7

Please ,solve me the solution

Answer 8

Where is pivoted ?