ex8a

q1 (a)

Resultant = 10 N

1(0) + 5(0.5) + 4(1) = 6.5 = 10x

=> x = 0.65 from q

q1 (b)

Res = 5 N

2(0) + 1(2) + 2 (5) = 12 = 5x

=> x = 2.4

q1 (c)

Res = -5N

1(0) -7(1) + 1(2) = -5 = -5x

=> x = 1

q2

res = - 6w

2w(0) + w(3) + 3W(6) = -21W = -6Wx

x = 3.5

q3

Need to draw out the diagram

res = -10w

10wx = 3w

x = 0.3

q4

draw again

res = w + x

(w+x)y = w

y = w/(w+x)

z = x/(w+x)

q5

res = (k + 5)w

res x = w + 2kw

x = w + 2kw / k + 5 = 7/10