Question

Four forces are acting on a body. If the body doesn't change its position or shape, the forces :

• A. Must be of equal magnitude
• B. Must be parallel & opposite
• C. Must add up to zero when taken as vectors
• D. Must be in a single line

Answer 1

The correct option is C Must add up to zero when taken as vectors

Answer is C.
Force is needed for a body to change its position and/or shape. Since the there is no change in the position or shape of the body, the net force acting on it should be zero.