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castortr0y [4]
3 years ago
14

Which equation correctly represents the gravitational potential energy of a

Physics
2 answers:
Lerok [7]3 years ago
7 0

Answer:

GPE = ME − 1/2​ mv^2

Explanation:

Just did it

arsen [322]3 years ago
5 0

Answer:

PE=ME-\dfrac{1}{2}mv^2

Explanation:

The mechanical energy of an object is equal to the sum of kinetic energy and the potential energy. Let ME is mechanical energy, KE is kinetic energy then its potential energy PE is given by :

ME=PE+KE

Since, KE = (1/2) mv^2

PE=ME-KE\\\\PE=ME-\dfrac{1}{2}mv^2

So, PE=ME-\dfrac{1}{2}mv^2 correctly represents the gravitational potential energy of a  .system

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A hockey stick of mass ms and length L is at rest on the ice (which is assumed to be frictionless). A puck with mass mp hits the
krek1111 [17]

Answer:

L = mp*v₀*(ms*D) / (ms + mp)

Explanation:

Given info

ms = mass of the hockey stick

uis = 0 (initial speed of the hockey stick before the collision)

xis = D (initial position of center of mass of the hockey stick before the collision)

mp = mass of the puck

uip = v₀ (initial speed of the puck before the collision)

xip = 0 (initial position of center of mass of the puck before the collision)

If we apply

Ycm = (ms*xis + mp*xip) / (ms + mp)

⇒  Ycm = (ms*D + mp*0) / (ms + mp)

⇒  Ycm = (ms*D) / (ms + mp)

Now, we can apply the equation

L = m*v*R

where m = mp

v = v₀

R = Ycm

then we have

L = mp*v₀*(ms*D) / (ms + mp)

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3 years ago
To escape from a horrible fire, two people are forced to jump from the third story of a burning building onto solid concrete. Wh
erica [24]
The bouncing person because the bounce helped him survive
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The magnetic flux through a loop:
dexar [7]

Answer:

The magnetic flux through a loop is zero when the B field is perpendicular to the plane of the loop.

Explanation:

Magnetic flux are also known as the magnetic line of force surrounding a bar magnetic in a magnetic field.

It is expressed mathematically as

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B is the magnetic field strength

A is the area

θ is the angle that the magnetic field make with the plane of the loop

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Since cos90° = 0

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3 years ago
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What is cosmic microwave background radiation?
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Cosmic, or background, radiation is the small amount of high energy radiation which is mostly left over from the big bang or from supernovas. It is mostly single protons, but also alpha particles and even sometimes heavier elements. It can also refer to the low levels of electromagnetic radiation present all over the universe.
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Indicate the type of wave motion of a flag waving in a breeze
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Answer:

Transverse waves, because the motion of the wave is perpendicular to the direction of propagation. An S-wave is an example of a transverse wave.

Explanation:

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