A graph depicts force versus position. What represents the work done by the force over the given displacement?A. The work done is equal to the product of the maximum force times the maximum position.
B. The work done is equal to the area under the curve.
C. Work cannot be determined from this type of graph.
D. The work done is equal to length of the curve.
E. The work done is equal to the slope of the curve.
Answers
With a force/distance graph, the work is the area under the graph.
If the graph is curved, broken, or some other screwy shape that makes it difficult to
get the area in any simple way, then work is the integral of the function represented
by the graph.
Final answer:
The work done by a force over a given displacement, as represented in a force versus position graph, is equal to the area under the curve.
Explanation:
In a force versus position graph, the work done by the force over the given displacement is represented by the area under the curve. The work done is the integral of the force with respect to displacement which, in a graphical representation, translates to the area under the curve of the force versus position graph. For example, if the force is constant, the graph will be a rectangle, and the work done will be the product of force (height of the rectangle) and displacement (width of the rectangle). If the force is variable, the area under the curve might need to be calculated by dividing it into small sections and summing up their areas.
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Related Questions
Is time a vector,scalar,both,neither
Cheryl has a mug that she says is made up of matter. Heather says that the hot chocolate inside the cup is made up of matter, too. Keaton says that the steam coming from the cup is also made up of matter. Mikayla says that none of it is matter because matter is too small to see. Which best describes who is correct?
Which statement explains why a blue house looks blue?The house reflects mostly red and green light The house absorbs mostly blue light The house reflects mostly blue light The house reflects every color expect blue
what will be the acceleration due to gravity at up planet whose mass is 8 times the mass of the earth and whose radius is twice that of the earth? g=10
density
melting point
magnetism
Answers
Answer:
flammability
Explanation:
As we know that chemical property of an element will show it's chemical reactivity and its chemical nature on exposing to a reaction.
While physical properties are those which can be measured by some experimental means.
So here we know that all the measurable quantities are
1). Density
2). Melting Point
Here one of the given option is phenomenon in which all the domains of magnet align itself in direction of external magnetic field it is known as Magnetism.
So here correct chemical property is
Flammability.
Final answer:
The flammability of magnesium is the chemical property among those listed. It depicts how it changes to magnesium oxide when heated in an oxygen environment.
Explanation:
The property listed that is a chemical property of magnesium is its flammability. Chemical properties describe how a substance interacts with other substances or changes from one substance to another. Flammability, meaning the ability to burn in the presence of oxygen, is a chemical property because it describes how magnesium will change to magnesium oxide when heated in air.
On the other hand, properties such as density, melting point, and magnetism are physical properties because they describe the physical state of the magnesium and not how it interacts with other chemicals.
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B. Density
C. Pressure
D. Temperature
Answers
A.Salinity
The deeper you make your way the hotter it gets because it is getting closer to the inner core which is 4000-4700 Degrees Celsius so that definitely would not be the answer. It also gets more and more dense and the pressure changes and you can see this by the fact that some mantles are liquid but because of the pressure it forces it into a solid. Sorry for the terrible explanation, I am bad at explaining things. Hope this helps!
Answers
Answer:
A) α = -1.228 rev/min²
B) 7980 revolutions
C) α_t = -8.57 x 10^(-4) m/s²
D) α = 21.5 m/s²
Explanation:
A) Using first equation of motion, we have;
ω = ω_o + αt
Where,
ω_o is initial angular velocity
α is angular acceleration
t is time the flywheel take to slow down to rest.
We are given, ω_o = 140 rev/min ; t = 1.9 hours = 1.9 x 60 seconds = 114 s ; ω = 0 rev/min
Thus,
0 = 140 + 114α
α = -140/114
α = -1.228 rev/min²
B) the number of revolutions would be given by the equation of motion;
S = (ω_o)t + (1/2)αt²
S = 140(114) - (1/2)(1.228)(114)²
S ≈ 7980 revolutions
C) we want to find tangential component of the velocity with r = 40cm = 0.4m
We will need to convert the angular acceleration to rad/s²
Thus,
α = -1.228 x (2π/60²) = - 0.0021433 rad/s²
Now, formula for tangential acceleration is;
α_t = α x r
α_t = - 0.0021433 x 0.4
α_t = -8.57 x 10^(-4) m/s²
D) we are told that the angular velocity is now 70 rev/min.
Let's convert it to rad/s;
ω = 70 x (2π/60) = 7.33 rad/s
So, radial angular acceleration is;
α_r = ω²r = 7.33² x 0.4
α_r = 21.49 m/s²
Thus, magnitude of total linear acceleration is;
α = √((α_t)² + (α_r)²)
α = √((-8.57 x 10^(-4))² + (21.49)²)
α = √461.82
α = 21.5 m/s²
Answers
b. False
Answers
Answer: The correct answer is False.
Explanation:
Infrared is an example of electromagnetic wave. The wavelength of this wave is shorter.
Sunburn is caused by UV-radiations because the wavelength of this wave is longer and energy is higher.
Relationship between wavelength and energy is given by the Planck's equation:
where,
E = energy of the wave
h = Planck's constant
c = speed of light
= Wavelength of the wave
From the above relation, wavelength of the wave is inversely proportional to the energy of the wave. Hence, infrared rays does not cause any sunburn because these waves have low energy and does not effect the skin.
Hence, the correct answer is False.