and the 5. (a) Find the tension in each string in figures (a) through compression in the beams of (c), (d)). Assume that the strings and beams are weightless. Heavy lines indicate ceilings, walls, or floors. (b) (c) (a) 90 30 70 100kg 250 100kg 90 (d) 90 2m 100kg 400 1m 100kg