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Draw Ă neat SRetthTwo forces of 5kg wt. and 10kg wt. acts at right angles to one another.2 Find the magnitude and direction of the resultant forces. |
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Answer» Let P = 5 kg weight = 5 g NewtonsQ = 10 g Newtons Using the parallelogram law of addition of vectors :Resultant forcemagnitude = R R² = P² + Q² + 2 P Q CosФ = 5² + 10² + 2 * 5 * 10 * Cos 90 = 125R = 5√5newtons Angle made by R with Q = 10 kg weight =α tanα = P Sin Ф/ ( P + Q Cos Ф) = 5 Sin 90 / (10 + 5 Cos 90) = 5/10=1/2 |
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