SSC MTS EXAM

Detailed explanation-1: -Newton’s First Law of motion states that a body at rest will remain at rest and body at motion will remain in uniform motion unless an unbalanced force acts on it to change its state of rest or of uniform motion.

Detailed explanation-2: -Inertia is the tendency of all objects to resist any change in motion. Inertia causes a moving object to stay in motion at the same velocity (speed and direction) unless a force acts on it to change its speed or direction. It also causes an object at rest to stay at rest.

Detailed explanation-3: -If the object is at rest, net force on the object is equal to zero; therefore, the downward force (weight) must be equal to the upward force (normal force). Since weight acts in the downward direction it will be negative. The total sum of the forces must be zero, in order for the object to be at rest.