18.75 N
15.75 N
9.50 N
8.66 N
Correct answer is D
\(F_{1} = (5 N, 060°) = 5 \cos 60 i + 5 \sin 60 j = 2.5 i + \frac{5\sqrt{3}}{2}j\)
\(F_{2} = (10 N, 180°) = 10 \cos 180 i + 10 \sin 180 j = -10i\)
\(R = F_{1} + F_{2} = -7.5 i + \frac{5\sqrt{3}}{2}j\)
\(|R| = \sqrt{(-7.5)^{2} + (\frac{5\sqrt{3}}{2})^{2}}\)
= \(\sqrt{56.25 + 18.75} = \sqrt{75}\)
= 8.66 N
Find the equation of the normal to the curve y = \(3x^2 + 2\) at point (1, 5)...
Solve the inequality \(2x^{2} + 5x - 3 \geq 0\)....
The derivative of a function f with respect to x is given by \(f'(x) = 3x^{2} - \frac{4}{x^{5}}\...
Solve: \(4(2^{x^2}) = 8^{x}\)...
What is the coordinate of the centre of the circle \(5x^{2} + 5y^{2} - 15x + 25y - 3 = 0\)?...
Evaluate \(\int_{1}^{2} (2 + 2x - 3x^{2}) \mathrm {d} x\)....
Find the equation of a circle with centre (-3, -8) and radius \(4\sqrt{6}\)...