Question

A student pulls a 60.-newton sled with a force

Answer 1

The magnitude of force exerted by the sled on the student is $\boxed{20\text{ N}}$.

Explanation:

Given:

The weight of the sled is $60\text{ N}$.

The force applied by the student on the sled is $20\text{ N}$.

Concept:

According to the Newton's third law of motion, each and every action on a body applies a equal and opposite reaction on the other body. It means if a person pulls a body by a force then the body also pulls the person with the same force towards itself.

The direction of the reaction applied by the body on the person will be opposite to the action of the person on the body.

In the same manner, as the student applies a force on the sled to pull it in the forward direction, the sled will also apply the same magnitude of force on the student to pull him back in the opposite direction.

The weight of the sled acts in the vertically downward direction and therefore, it will not play any role in the reaction force of the sled on the student.

Thus, the magnitude of force exerted by the sled on the student is $\boxed{20\text{ N}}$.

Learn More:

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2. The unit of the gravitational constant brainly.com/question/1724648

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Answer Details:

Grade: High School

Subject: Physics

Chapter: Laws of motion

Keywords:

student, pulls, a sled, magnitude of force, action, reaction, newton's third law, exerts, applies a force, opposite direction.

Answer 2

20 N

Newtons third law states that any action (pulling the sled) has an equal and opposite reaction (the sled pulling back on you).
Think about pulling a sled on really slippery ice, you would pull yourself toward the sled just as much as the sled toward you.