Question

6 A weight Quis suspended from B of a cord ABC the ends of which are are pulled by equal weights P. overhanging small pull in A and c which are on the same level, neglecting the ratio of pull AB determine the stag BD if Lis 12M and p is 20N and Q is 10N​

Answer 1

Answer:

The Free body diagram of the system is shown.

For block A: T−mg=ma

T−2g=2a

We get T=2a+2g

For block B + C system : mg+mg−T=(m+m)a

2g+2g−T=(2+2)a

⟹4g−T=4a

Or 4g−2a−2g=4a

Or 2g=6a

This gives a=g/3

For block C: mg−T

=ma

2g−T

=2a

Or 2g−T

=

3

2g

Thus we get T

=4g/3=

3

4×10

=13N