2 years ago

Mass of block A above is 25-kg. Calculate the force of gravity on block A.

Physics

1 answer:

stiv31 [10]2 years ago

4 0

Answer:w+mg

Explanation:

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if the distance of separation begin two objects is doubled, is the gravitational force between the objects increased or decrease

SashulF [63]

Answer:

force is decreased by a factor of 4.

Explanation:

According to the Newton's law of gravitation, the force of gravitation between the two object is inversely proportional to the square of distance between them. Now the distance is doubled, so the force between the two objects becomes one forth.

Force is decreased by a factor or 4.

7 0

3 years ago

A perfectly flexible cable has length L, and initially it is at rest with a length Xo of it hanging over the table edge. Neglect

zaharov [31]

Answer:

$X=X_o+\dfrac{1}{2}gt^2$

Explanation:

Given that

Length = L

At initial over hanging length = Xo

Lets take the length =X after time t

The velocity of length will become V

Now by energy conservation

$\dfrac{1}{2}mV^2=mg(X-X_o)$

$V=\sqrt{2g(X-X_o)}$

We know that

$\dfrac{dX}{dt}=V$

$\dfrac{dX}{dt}=\sqrt{2g(X-X_o)}$

$\sqrt{2g}\ dt=(X-X_o)^{-\frac{1}{2}}dX$

At t= 0 ,X=Xo

So we can say that

$X=X_o+\dfrac{1}{2}gt^2$

So the length of cable after time t

$X=X_o+\dfrac{1}{2}gt^2$

6 0

3 years ago

If 2.0 j of work is requiered to move 4 c of chsrge between two points in an electric firld, what is the potential difference be

djverab [1.8K]

2 J / 4 C = 1/2 joule per coulomb.

That's 1/2 volt.

5 0

3 years ago

To determine the speed of a wave, you would use which of the following formulas?

vovangra [49]

Speed = wavelength x frequency determine the speed of a wave,

4 0

2 years ago

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An electron is to be accelerated from a velocity of 3.00×106m/s to a velocity of 8.00×106m/s . Through what potential difference

Jobisdone [24]

mmmm I don't really understand

8 0

3 years ago