Question

Four forces P= 150 N (East), Q = 200 N (North), R = 200 N (South) and S = 150 N (West) are acting on member, their resultant is
a) 0 N
b) 500 N
c) 400 N
d) 300 N​

Answer 1

Given info : Four forces, P = 150 N (East)

Q = 200 N (North )

R = 200 N (south )

S = 150 N (West ) acting on a system

To find : their resultant is ...

solution : you know, force is vector quantity so convert all forces into vector forms.

P = 150 i N

Q = 200 j N

R = -200 j N

S = - 150 i N

now resultant of all forces = P + Q + R + Q

= [ 150i + 200 j + (-200 j) + (-150 i) ] N

= 0 N

Therefore the resultant of all those forces is 0 N.

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