1. The problem statement, all variables and given/known data Please refer to the attachment. 2. Relevant equations Sum of x and y forces = zero Sum of moments about any point = zero 3. The attempt at a solution By looking at the portion of the string under the crate, there are 3 forces acting on it, namely the two tensions at the side and the weight of the crate. Hence I deduce that the gravitational force of the crate acting on the string is the sum of the two vertical components of the tensions. Can anyone tell me if I'm right or am I missing out on any forces? Please help, thanks much!