Question

53.
Two forces P and Q act at an angle 120° with each other. If the resultant force is at right angles to
the force P and P is equal to 4 N then force Q is
1) 2N
2) 4N
3) 6N
4) 8N​

Answer 1

Answer:

4) 8 N

Explanation:

1) We have, two force vectors P and Q act at an angle 120 degree with each other.

Since, the resultant force is at right angles to forces P :

=> Component of Q along (-P) is equal to P.

That is,

$Qsin(30^{\circ})=P\\ \\=>Q*\frac{1}{2}=4\\ \\=>Q=8N.$

Figure is as attached .

Value of Q is 8N.(double of P)

Answer 2

pls check your answer in the above pic