12 answers
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a. F = 7 + 10 = 17 N.
b. F = 10-7 = 3 N.
c. F1 = 7N[45o].
F2 = 10N[105o].
X = 7*cos45 + 10*cos105 = 2.36 N.
Y = 7*sin45 + 10*sin105 = 14.6 N.
tanA = Y/X = 14.6/2.36 = 6.18644
A = 80.8o
Fr=Y/sinA = 14.6/sin80.8=14.8 N.[80.8o]
= Resultant force.
d. Fr = 7[160o] + 10[160o] = 17N[160o].
e. Fr = 7[90o] + 10[90o] = 17N[90o]