Question

Using a scale of 1 cm to represent 10N, find the size and direction of the resultant of forces of 30 N and 40 N acting at right angles to each other.

Answer 1

Answer:

size of the resultant force is 50N or (5 cm on the scale) making an angle of 45 degree with the x-axis

Explanation:

The resultant force of A and B making an angle of 'a' is given by

R=sqrt(A*A+B*B+2*A*B*cos(a))

In this case forces are acting at right angle cos(a) = 0 so resultant force = 50N and at an angle of 45 degree with the x-axis