Question

how will we solve these questions?
I mean how to make F.B.D. ?


Figure (5-E8) shows a uniform rod of length 30 cm
having a mass of 3.0 kg. The strings shown in the figure
are pulled by constant forces of 20 N and 32 N. Find
the force exerted by the 20 cm part of the rod on the
10 cm part. All the surfaces are smooth and the strings
and the pulleys are light.

Answer 1

@amistre64 Please help:D

Answer 2

@Vaidehi09 Plz help:)

Answer 3

What is the answer? :P

Answer 4

I'm not too sure about this, but here's what I came up with so far:
let the 10cm part be A and the other be B. so the rod can also be viewed as two blocks A and B, which are in contact with each other. so the FBD of both will be as follows:

where Fn = the contact force between A and B <= what we have to find out
and Ra = reaction force from the table.