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charle [14.2K]
3 years ago
14

A quantity of gasoline injected into car engine has a potential energy of 100J. All of this energy is not converted into useable

work because
Physics
1 answer:
neonofarm [45]3 years ago
5 0

Answer:because some energy are lost due to friction

Explanation:some energy are lost due to friction

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Answer:

No sand doesn't stay sand forever.

Explanation:

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You hold your physics textbook in your hand. (Assume that no other objects are in contact with the book.)
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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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The mechanical energy of an object equals its
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B. Kinetic energy plus its potential energy.
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