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29/12/2021 12:53 pm
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Find the value of the resultant force shown in the figure.
(a) −10.75 î− 8 ĵ
(b) −10.75 î− 9 ĵ
(c) −12.75 î− 7 ĵ
(d) −15.75 î− 9 ĵ
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29/12/2021 12:56 pm
Correct answer: (d) -15.75 î - 9 ĵ
Explanation:
Resultant = î(10 cos 30° + 10 cos 60° - 5 cos 30° - 15 cos 45° + 20 cos 45° + ĵ(10 sin 30° + 10 sin 60° + 5 sin 30° - 15 sin 45° - 20 cos 45°
= -15.75 î - 9 ĵ