Question

A worker pushes a box in a factory. In each case, decide which force has the greater magnitude: the force exerted by the worker on the box or the force exerted by the box on the worker.Part AThe box is heavy and does not move no matter how hard the worker pushes.A)The force exerted by the worker on the box is greater.B)The magnitudes of the forces are equal.C)The force exerted by the box on the worker is greater.Part BSome contents are removed, and now when pushed the box slides across the floor at constant speed.A)The force exerted by the worker on the box is greater.B)The magnitudes of the forces are equal.C)The force exerted by the box on the worker is greater.Part CThe worker pushes harder, and the box accelerates.A)The magnitudes of the forces are equal.B)The force exerted by the worker on the box is greater.C)The force exerted by the box on the worker is greater.

Answer 1

Explanation:

Part (1) :

A worker pushes a box in a factory. We know that the Newton's third law of motion tells that there exist an equal and opposite reaction when a force is applied to an object. Here, the magnitudes of the forces are equal when a worker pushes a box.

Part (2) :

When some contents are removed, and now when pushed the box slides across the floor at constant speed. Then the Newton's third law will be followed. So, the magnitudes of the forces are equal.

Part (3) :

When the worker pushes harder, and the box accelerates. So, the force exerted by the worker on the box is greater.