3 years ago

Please help. Explain why it is correct. I will give brainliest

Physics

1 answer:

blsea [12.9K]3 years ago

7 0

Answer: Hey

B an encyclopedia entry about an experiment

A primary resource is information that was documented during an event that was written about.

Please wait tell you get another answer because im not sure about this

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The image shows a roller coaster.

mariarad [96]

I believe the answer is c but I’m not 100% sure

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3 years ago

A bus travelling 30.0 km/h east has a constant increase in speed of 1.5 m/s. What is its velocity 6.8s later

alekssr [168]

Answer:

8.72 seconds before

Explanation:

and 27.1 secs after

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3 years ago

What does the "coefficient of friction" tell you?

Arte-miy333 [17]

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A box with a mass of 7 kilograms is pushed up a ramp to a height of 5 meters. What is the work done against the force of gravity

muminat

The potential energy of the box when it gets to the top is

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3 years ago

A book, that has a mass of 0.5 grams, is pushed across a table with a force of 20 newtons. What is the acceleration of the book?

Bas_tet [7]

Answer:

$4\cdot 10^4 m/s^2$

Explanation:

The acceleration of an object is given by Newton's second law:

$a=\frac{F}{m}$

where

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m is the mass of the object

For the book in the problem, we have:

$m=0.5 g =5\cdot 10^{-4} kg$ is the mass

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Substituting into the formula, we find the acceleration:

$a=\frac{20 N}{5\cdot 10^{-4} kg}=4\cdot 10^4 m/s^2$

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3 years ago