Using a scale of 1 cm to represent 10 N, find the size and direction of the resultant of forces of 30 N and 40 N acting at right angles to each other
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Any physical quantity that has a magnitude as well direction is known as vector. It is denoted by an arrow symbol where the length of the arrow represents its magnitude and the head of the arrow represent the direction of the vector.
There are four cardinal directions: north(N), south(S), east(E) and west(W). All these directions are perpendicular to each other and used to represent the direction.
The resultant of two vectors can be determined either by triangle law of vector or parallelogram law of vector. The formula to calculate the magnitude of the resultant is given as:
R=√v21+v22+2v1v2cosθ
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