Two forces of 27 pounds and 62 pounds act on a body so that the resultant is a force of 76 pounds. Find, to the nearest degree, the angle between the resultant and the larger force.
1 answer:
Answer:
19 degrees.
Step-by-step explanation:
Triangle of forces.
We can represent this sytem by a triangle with sides 27, 62 and 76 where the required angle is opposite the smallest side. Then we apply the Law of Cosines:
Cos x = (27^2 - 62^2 - 76^2) / (-2*62*76)
cos x = 0.94344
x = 19.36 degrees.
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