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3 years ago

Newtons law of gravitation is called a universal law why

Physics

1 answer:

mihalych1998 [28]3 years ago

7 0

Answer:

it is applicable on all bodies having mass and the bodies Will be governed by the same law

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A car has<br> weight of 10,ooow<br> What is the mass of the car<br> on earth (g=10N/KG)

Gre4nikov [31]

Answer:

1000 kg

Explanation:

We know the formula for finding out weight is W=mg

W= 10,000 N

M=?

g=10 N/KG

W=mg

10,000=10m

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3 years ago

A uniform rod of mass M and length L can pivot freely at one end. Initially, the rod is oriented vertically above the pivot, in

Leya [2.2K]

Answer:

The speed of its center of mass = $\sqrt{\frac{3}{2}gL}$

Explanation:

Consider the potential energy at the level of center of mass of rod below the pivot=0

Mass of uniform rod=M

Length of rod=L

The rotational inertia about the end of a uniform rod= $\frac{1}{3}ML^2$

Kinetic energy at the level of center of mass of rod below the pivot= $\frac{1}{2}I\omega^2$

Kinetic energy at the level of center of mass of rod above the pivot=0

Potential energy at the level of center of mass of rod above the pivot=mgh

We have to find the center of mass ( in terms of g and L).

According to conservation of law of energy

Initial P.E+Initial K.E=Final P.E+Final K.E

$mgh+0=0+\frac{1}{2} I\omega^2$

Where $K.E=\frac{1}{2} I\omega^2$

I=Moment of inertia

$\omega$ =Angular velocity

Substitute the values then we get

$MgL=\frac{1}{2}\times \frac{1}{3}ML^2\omega^2$

$\omega^2=\frac{6g}{L}$

Now, we know that $\omega=\frac{v}{r}$ , $r=\frac{L}{2}$

Substitute the values then we get

$\frac{v^2}{(\frac{L}{2})^2}=\frac{6g}{L}$

$\frac{v^24}{L^2}=\frac{6g}{L}$

$v^2=\frac{6g\times L^2}{4L}$

$v^2=\frac{3gL}{2}$

$v=\sqrt{\frac{3}{2}gL}$

Hence, the speed of its center of mass = $\sqrt{\frac{3}{2}gL}$

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4 years ago

Nathan is standing 2 feet away from a plane mirror. Hiva is standing 5 feet further than

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Answer:

They are standing 3 feet away from each other

Explanation:

If Nathan Is standing 2 feet away from the mirror. Then Hiva is standing 7 feet away from the mirror is she is standing 5 feet further than him. They are standing 3 feet away from each other.

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3 years ago

If distance between two charges increased 5 times then force between them

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decreased 5 times

Explanation: if the force increases 5 times between them would decrease 5 times

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3 years ago

The table shows the potential energy and kinetic energy of a skier at two different positions on a hill.

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Answer:

30,000 units, because total energy remains unchanged

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3 years ago

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Newtons law of gravitation is called a universal law why​

Newtons law of gravitation is called a universal law why