5 Select the correct answer. If v_(x)=3meters/second and v_(y)=4meters/second, what is the magnitude of the resultant velocity? A. 7meters/second B. 5meters/second C. 1meters/second D. 6meters/second

To find the magnitude of the resultant velocity, we can use the Pythagorean theorem. The magnitude of the resultant velocity is given by:<br /><br />$v = \sqrt{v_x^2 + v_y^2}$<br /><br />Substituting the given values:<br /><br />$v = \sqrt{3^2 + 4^2} = \sqrt{9 + 16} = \sqrt{25} = 5$<br /><br />Therefore, the correct answer is:<br /><br />B. $5meters/second$