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These are the answered multiple choice questions about the forces in the Student and Backpack problem....

These are the answered multiple choice questions about the forces in the Student and Backpack problem. Make a clear diagram which properly identifies all of the forces acting on the student (you will also need a similar, separate, diagram for the backpack), and then making the proper arguments leading to the correct answer.

(a) Which is stronger force, the force on the student by the backpack or the force on the backpack by the student?

The two forces are equally strong by Newton's First Law.


(b) Which is the stronger force, the force on the backpack by the student or the weight of the backpack?

The two forces are equally strong by Newton's Third Law.


(c) Which is the stronger force, the force on the student by the backpack or the weight of the backpack?

The force on the student by the backpack is stronger.The two forces are equally strong by a combination of Newton's First Law and Newton's Third Law.


(d) What kind of force is the force on the student by the backpack?

An electromagnetic force.


(e) Which is the stronger force, the contact force on the student by the ground or the weight of the student?

The force on the student by the ground is stronger.

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