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You hold your physics textbook in your hand. (Assume that no other objects are in contact with the book.)

1. Identify the forces acting on the book.

a. book on hand.
b. hand on book.
c. floor on book.
d. earth on book.

2. For each force you identified in part 1), indicate the direction.

a. book on hand
b. hand on book
c. floor on book
d. earth on book

3. Identify the forces acting on your hand.

a. book on hand
b. hand on book
c. floor on hand
d. earth on hand

4. For each force you identified in part 3), indicate the direction.

a. book on hand
b. hand on book
c. floor on hand
d. earth on hand

5. Identify the forces that form the action-reaction pair as defined by Newton's third law.

a. earth on hand
b. hand on book

Sagot :

Answer:

1) the correct answer is b and d

2) For force b its direction is vertical up

   for the force d its direction is vertical down

3) the correct answers are: a, c and d

4) Force a is vertical down , force c is vertical up and force d is vertical down

5) the correct answer which is b

Explanation:

In this exercise it is asked to identify the forces, fundamentally on the free there are the forces of gravity and the support force of the hand, with these facts we answer the questions

1) the correct answer is b and d

the hand acts on the book with a contact force and the Earth acts on the book with the force of gravity.

2) For force b its direction is vertical up

   for the force d its direction is vertical down

3) The forces on the hand are the weight of the book. The force of gravity due to the mass of the hand. As the hand is in balance, there must be a force applied by the arm to keep the hand in position; assuming the hand is in the air, if the hand is resting on the floor the force of the floor on the hand can perform this function

therefore the correct answers are: a, c and d

4) Force a is vertical down

    force c is vertical up

   force d is vertical down

5) The action and reaction forces are forces of equal magnitude, each applied to one of the bodies, we have

* the force of the hand on the free and its reaction the force of the book on the hand

* The force of the Earth on the book and the hand, giving the weight of each one and the relationship is the force of the book and the hand on the Earth

the correct answer which is b

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