Question

three forces of magnitudes 30,60 and P Newton acting at a point are in equilibrium. if the angle between the first two is 60 degree, the value of p is​

Answer 1

Explanation:

Resultant of first two forces= √{(30)²+(60)²+2×30×60cos60}

=√900+3600+1800

=√6300

=30√7 N

Now for equilibrium sum of all three forces must be zero,

30√7 + P =0

P=-30√7 N

minus sign indicates that force is in opp. direction or simply,

|P|= 30√7 N