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3 years ago

If you jump vertically while inside a fast-moving train that is slowing down, you land:

Physics

1 answer:

Semenov [28]3 years ago

3 0

Answer;

B. at your original position.

Explanation.

It the train does not slow down the to the force of gravity you would land far behind the train. Here, it slows down and you already jumped vertically up, you cover some certain distance from the train up in the air and it is also slowing down you will likely come to your original position.

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3 years ago

The estimated mass of the planet jupiter is 1.90 × 1027 kg and the density is believed to be 1.34 g/cm3. if jupiter were a perfe

V125BC [204]

We use the formula,

$density=\frac{mass}{volume}$

Given, $mass=1.90\times 10^{27}\ kg = 1.90\times 10^{30}\ g$ and $density =1.34\ g/cm^3$ .

Substituting these values, we get

$volume = \frac{1.90\times 10^{30}\ g}{1.34\ g/cm^3} =1.4179\times 10^{30}\ cm^3$ .

As Jupiter were a perfect sphere, therefore the volume of sphere is given by

$volume=\frac{4}{3} \pi r^3$

Here, r is the radius of sphere.

Substituting the value of volume we get

$1.4179\times 10^{30}\ cm^3=\frac{4}{3}\times 3.14\times r^3 \\\\ r^3=0.339\times 10^{30} \\\\r= 0.697\times 10^{10}\ cm$ .

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$2r=2\times 0.697\times 10^{10}\ cm=1.394\times 10^{10}\ cm$

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3 years ago

A sled of mass 28 kg slides across the ground with a friction force of 200.3 N. What is k between the sled and the ground?

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K=Frictional Force/Normal Force
Normal force would be mg, since it's not on an incline.
Normal Force = 28 kg*9.8 m/s^2 = 274.4 N

200.3 N/274.4 N = 0.73

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4 years ago