# Newton's third law

The newton's third law states that the force exerted by body A on body B is equal to the force exerted by Body B on Body A . In this case, isn't the object supposed to be stationary because equal forces are acting on both sides?
Can someone please explain to me . Thanks

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nasu
Gold Member
Which object?

Nugatory
Mentor
The newton's third law states that the force exerted by body A on body B is equal to the force exerted by Body B on Body A . In this case, isn't the object supposed to be stationary because equal forces are acting on both sides?
Can someone please explain to me . Thanks
The force exerted on body A causes body A to move.
The force exerted on body B causes body B to move.
These are two different forces acting on two different bodies; Newton's third law says that they will be of equal magnitude and opposite direction.

jtbell
Mentor
In this case, isn't the object supposed to be stationary because equal forces are acting on both sides?
If there are no other forces acting on A and B, then the net force on the system of A and B together is indeed zero. It has an important physical consequence: the center of mass of the system either remains at rest, or moves at constant velocity according to Newton's First Law.

sophiecentaur