Question

Three bodies A (1kg), B (2kg) and C(3kg) are connected
by light inextensible strings and the system is pulled
with a force F. If the tension in the string connecting B
and C is 4.5N, the force F is
​

Answer 1

Answer:

consider all A B C all in one system

so a =F /m= F/6

draw fbd of a and b as one system

so T on right hand

so F = ma

T = ma

4.5 = 3F/6

F = 9N