If a 50 N weight is sitting motionless on a table, what is the net force acting on the object?

A. 0 N

B. - 50 N

C. + 50 N

D. + 100 N

A net force is a sum of all forces acting on an object.

F net = F 1 + F 2 + ... + F n

If the net force acting on an object is zero (0), then the object is in a state of equilibrium. In this case, weight is balanced out by table's support force ( / or the normal force):

F net = - 50 N + 50 N = 0 N

Answer: A. 0 N.