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sladkih [1.3K]
3 years ago
5

9) Because of friction A) energy is NOT always conserved. B) NOT all potential energy is converted to kinetic energy. C) all of

an object's kinetic energy turns into potential energy. D) all of an object's potential energy turns into kinetic energy.
Physics
2 answers:
ehidna [41]3 years ago
8 0
<h2>Answer:</h2>

<u>The right choice is </u><u>(B) NOT all potential energy is converted to kinetic energy.</u>

<h2>Explanation:</h2>

Friction is a repulsive or resistive force to motion of any body in motion. When two bodies move against each other some of the kinetic energy is converted to heat energy due to friction. This reduces the total kinetic energy in the system.  In other words we can say that when two contacting surfaces move relative to each other, the friction between the two surfaces converts kinetic energy into thermal energy, or heat.

Nina [5.8K]3 years ago
6 0
<h2>Hello!</h2>

The answer is: B) NOT all potential energy is converted to kinetic energy

<h2>Why?</h2>

Let's discard each option in order to find the correct option:

A) energy is NOT always conserved, False: Energy is always conserved, energy can turn to another kind of energy but the energy will be always conserved.

B) NOT all potential energy is converted to kinetic energy, True: We must remember that Energy of Friction usually opposes to the movement of a body, so, it means that all the potential energy (work) applied to an object would not be converted into kinetic energy (movement).

C) all of an object's kinetic energy turns into potential energy, false: Since the Energy of Friction is acting, not all of the kinetic energy will be turned into potential energy.

D) all of an object's potential energy turns into kinetic energy, false: Since B is true, D is false, not all potential energy is converted to kinetic energy because of the energy of friction.

Have a nice day!

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inna [77]

Answer:

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3 0
3 years ago
A convex mirror, like the passenger-side rearview mirror on a car, has a focal length of -3.0 m . An object is 6.0 m from the mi
Artist 52 [7]

A) -2.0 m

Look at the ray diagram attached in the picture, where:

p identifies the location of the object

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F identifies the focus of the mirror

Each tick represents 1 m

We have

p = 6.0 m is the distance of the object from the mirror

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From the ray diagram, we see that q has a distance of 2.0 m from the mirror, and it's on the other side of the mirror compared to the object, so

q = -2.0 m

This can also be verified by using the mirror equation:

\frac{1}{q}=\frac{1}{f}-\frac{1}{p}=\frac{1}{-3.0 m}-\frac{1}{6.0 m}=-\frac{3}{6.0 cm}\\q = \frac{-6.0 cm}{3}=-2.0 cm

B) Upright and virtual

As we see from the picture, the image is upright, since it has same orientation as the object.

Also, we notice that the image is on the other side of the mirror, compared to the object. For a mirror,

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8 0
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The bohr shift on the oxygen-hemoglobin dissociation curve is produced by changes in
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7 0
3 years ago
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3 0
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