1. The problem statement, all variables and given/known data Find the readings on each of the balances in these 4 situations (strings are massless and incline is frictionless): (sorry about the photo - dont know how to fix it) 2. Relevant equations F=ma, W=mg 3. The attempt at a solution 1) Seems easy enough. Im pretty sure the balance would just read 98 N since the tension above equals the weight of the mass below. 2) Im having a little trouble with this one. I cannot tell if its going to be 196 N (98 N from each of the weight pulling down on each end) or just 98 N. Each of the blocks has a net force equation of: F = W - T = ma 98 - T = 0 T = 98 N (T, the tension, is what the scale will read, correct? Thats where the answer comes from?) so I get the tention in the string is 98 for both but I dont know how to combine the two net force equations into a single answer for the balance reading. 3) the block has a net force equation of: F = W - T - T = ma W - 2T = 0 W = 2T so the tension in the string/balance reading would be half of the blocks weight = 49 N. 4) I know I need the component of the blocks weight on this one due to the incline. And that should be Wsin30 = 49. so the net force equation here is: F = Wsin30 - T = ma T = Wsin30 = 49 N is that the correct answer? What about that other 10 kg block above? How does it get included into the problem (if at all?) thanks.