Thanks. I knew adding the two forces like that couldn't be right
so if i find the value of F1 and F2 (angle of 60 degrees between them), and resolve them into one resultant vector force.. that will be the correct answer?
Three point charges with a distance a between them (as shown). What is the resultant force on q1?
Is this correct or am I doing this completely wrong?
edit: that should be Q1 multiplied by Q3 not adding
http://img513.imageshack.us/img513/3668/untitledxr7.jpg
'The intensity level of sound in a factory is 93.0 dB when all seven of its machines are working. If four machines are shut down for maintenance, what is the intensity level of the sound from the remaining machines? Assume that all seven machines are identical.'
I know the answer is not just...