Question

please answer me this question​

Answer 1

Answer:

5m,0.5m

Explanation:

In first question we can see that the total 10 kg of mass interchange their position so let us take the one end to be the axis due to no net force we will conserve their position

10*l/2+10*l=10x+10(l/2+x)...i

Here x be the Displacement of the blank from the axis and l/2 is the position of com of plank

And after solving i we get x=5

In second question we do the same but here we know all mass content is change

So

10*l/2+50*l=(40+50+10)(l/2+x)

Where x is the Displacement of the plank wrt the axis

We get x=0.5