Question

While closing a door of mass 10 kg, a student pushes on it with a force of 25 N. As the door is accelerating to close, what force does the door exert on the student?

1) 5 N
2) 25 N
3) 250 N
4) 35 N

Answer 1

The door exerts an equal and opposite force of 25 N on the student, according to Newton's Third Law of Motion.

Step-by-step explanation:

When a student pushes on a door with a force, by Newton's Third Law of Motion, and the door exerts an equal and opposite force on the student. So, if a student pushes a door with a 25 N force, according to Newton's Third Law, the door also pushes back on the student with the same magnitude of force, which is 25 N. Hence, the force that the door exerts on the student is 25 N.