Question

two forces P and Q are acting at a point in a plane the angle between the force is α . prove that the resultant (R) of the two force is given by R=(p²+Q²+2PQ cos α )½​

Answer 1

Answer:

a point in a plane the angle between the force is α . prove that the resultant (R) of the two force is given by R=(p²+Q²+2PQ cos α )½