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GuDViN [60]
3 years ago
7

In a system with only a single force acting upon a body, what is the relationship between the change in kinetic energy and the w

ork done by the force?
Physics
1 answer:
Makovka662 [10]3 years ago
6 0

Answer: W.D = 1/2mv^2

Explanation:

If an external force or a single force is acting on a body. Just like the first law of thermodynamics, the force acting on the body will cause work done on the system.

Work done = force × distance

And the work done on the body will cause the molecules of the body to experience motion and thereby producing kinetic energy.

The work done will be converted to kinetic energy.

W.D = 1/2mv^2

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A 1.2 g pebble is stuck in a tread of a 0.76 m diameter automobile tire, held in place by static friction that can be at most 3.
Maksim231197 [3]

Answer:

v=33.764m/s

Explanation:

Given data

Mass m=1.2 g=0.0012 kg

diameter d=0.76 m

Friction Force F=3.6 N

To find

Velocity v

Solution

From the Centripetal force we know that

F_{c}=\frac{mv^{2} }{r}

Where m is mass

v is velocity

r is radius

Substitute the given values to find velocity v

So

F_{c}=\frac{mv^{2} }{r}\\v^{2}=\frac{F_{c}(r)}{m}\\ v=\sqrt{\frac{F_{c}(r)}{m}}\\ v=\sqrt{\frac{F_{c}(diameter/2)}{m}}\\v=\sqrt{\frac{(3.6N)(0.76/2)m}{(0.0012kg)}}\\v=33.764m/s

4 0
3 years ago
HURRY PLEASE!!!!!
ycow [4]

Who conducted the study?

Explanation:

One good question to ask the toothpaste making company is who conducted the study?

A company making toothpaste claiming a scientific study revealed that their toothpaste makes the mouth five times cleaner must have introduced a bias in this finding.

  • For a scientific study to be accepted and substantiated, it must have been tested and repeated by other scientists.
  • If no other scientist confirms this, then there is an obvious bias in the claim and it is not scientific.

Learn more:

Objective reporting brainly.com/question/2242789

#learnwithBrainly

7 0
3 years ago
how can there be so many different substances in the world if there are only a few elements that are common? 
LuckyWell [14K]
-- If there are only  <em>10</em>  elements in the universe that can make compound molecules, and a compound molecule can be formed by combining  1,  2,  3, or  4  different elements, then that's already the possibility of  at least 400 different molecules.

-- There are many more than  10  elements that can combine to form compound molecules.

-- Every single "<em>organic</em>" molecule, of which there are thousands, is the combination of <em>carbon</em> with other elements.

-- Most all of the substances that can be distilled out of oil, including the paraffin waxes, the alcohols, gasoline, kerosene, butane, propane, octane, and natural gas, are made of just carbon, hydrogen, and oxygen, only with different numbers of each one. 

-- Plastics, drugs, rubber, and DNA are examples of molecules that are made of <em>hundreds</em> of atoms.
3 0
3 years ago
The classification and collection of data that are in the form of numbers is called
PSYCHO15rus [73]

Answer:

Statistics

Explanation:

4 0
3 years ago
How are frequency and wavelength related?
marshall27 [118]
Frequency is indirectly proportional to the wavelength, in other words, when frequency increases wavelength decreases and vice-versa

c = ∧f

Hope this helps!
8 0
3 years ago
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