Engineering Mechanics
If ‘P’ is the force acting on the body, ‘m’ is the mass of the body and ‘a’ is the acceleration of the body, then according to Newton's second law of motion,

P/m.a = 0
P + m.a = 0
P × m.a = 0
P - m.a = 0

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Engineering Mechanics
Non-coplanar non-concurrent forces are those forces which

Do not meet at one point and their lines of action do not lie on the same plane
Do not meet at one point but their lines of action lie on the same plane
Meet at one point, but their lines of action do not lie on the same plane
None of these

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