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vlabodo [156]
3 years ago
13

Which of the following is an explanation of how the natural world works, based on experimentation?

Physics
2 answers:
Nostrana [21]3 years ago
5 0

Answer:

It is an analysis.....

Ierofanga [76]3 years ago
3 0

Answer:it’s a theory

Explanation:

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If the coefficient of kinetic friction between a 22 kg kg crate and the floor is 0.27, what horizontal force is required to move
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Answer:

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Explanation:

the data we have is:

mass: m=22kg

coefficient of friction: \mu =0.27

and we also know the acceleration of gravity is g=9.81m/s^2

We need to do an analysis of horizontal and vertical forces acting on the object:

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Vertically the forces acting on the object:

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so the sum of forces in the vertical axis "y" are:

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from Newton's second Law we know that F=ma, so:

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now let's analyze the horizontal forces

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and the two forces just mentioned must be opposite, thus the sum of forces in the "x" axis is:

F=ma_{x}=F-f\\ma_{x}=F-\mu mg

and we are told that the crate moves at a steady speed, thus there is no acceleration: a_{x}=0

and we get:

0=F-\mu mg\\F=\mu mg

substituting known values:

F=(0.27)(22kg)(9.81m/s^2)\\F=58.27N

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C

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