Question

In which case will the object move due to an unbalanced force?

A.
Up = 450 N
Right = 450 N
Down = 450 N
Left = 450 N

B.
Up = 300 N
Right = 300 N
Down = 300 N
Left = 250 N

C.
Up = 300 N
Right = 400 N
Down = 300 N
Left = 400 N

D.
Up = 550 N
Right = 200 N
Down = 550 N
Left = 200 N

Answer 1

An object will move left or right if the sum of the forces in the horizontal direction is not zero.
An object will move up or down if the sum of the forces in the vertical direction is not zero.

Answer 2

According to the Newton's laws, for an object to move, there should be a force exerted. In A,C,D all the forces cancel and therefore there will be no motion. But in B there is a resultant force of 50N to the upwards which will make a motion...