What is the resultant magnitude of 6N force acting at right angle to a 8N force?

The magnitude of the resultant force is found using the Pythagorean theorem, which states that the square of the hypotenuse of a right triangle is equal to the sum of the squares of the other two sides. In this case, the resultant force is √(6^2 + 8^2) = √(36 + 64) = √100 = 10N.