Physics, 11.10.2020 22:01 maliyah7516

A 0.5 kg mass moves 40 centimeters up the incline shown in the figure below. The vertical height of the incline is 7 centimeters. What is the change in the potential energy (in Joules) of the mass as it goes up the incline?

A 0.5 kg mass moves 40 centimeters up the incline shown in the figure below. The vertical height of

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Answer from: fufnun3379

The change in potential energy of the mass as it goes up the incline is 0.343 joules.

Explanation:

We must remember in this case that change in the potential energy is entirely represented by the change in the gravitational potential energy. From Work-Energy Theorem and definition of work we get that:

$U_{g}= m\cdot g\cdot \Delta y$

Where:

$U_{g}$ - Gravitational potential energy, measured in Joules.

- Mass, measured in kilograms.

- Gravitational acceleration, measured in meters per square second.

$\Delta y$ - Change in vertical height, measured in meters.

This work is the energy needed to counteract effects of gravity at given vertical displacement.

If we know that $m = 0.5\,kg$ , $g = 9.807\,\frac{m}{s^{2}}$ and $\Delta y = 0.07\,m$ , the change in the potential energy of the mass as it goes up the incline is:

$U_{g} = (0.5\,kg)\cdot \left(9.807\,\frac{m}{s^{2}} \right)\cdot (0.07\,m)$

$U_{g} = 0.343\,J$

The change in potential energy of the mass as it goes up the incline is 0.343 joules.

Answer from: Quest

$efficiency \: = \frac{useful \: energy \: output}{total \: energy \: input} \ \times$ $100$ therefore, the efficiency is: $\frac{222}{222} \times 100$ $= 100\%$

Answer from: Quest

-first use of geothermal energy occurred more than 10,000 years ago in north america by american paleo-indians

-the first industrial use of geothermal energy began near pisa, italy in late 18th century

-in 1904, italian scientist piero ginori conti invented the first geothermal electric power plant in which steam was used to generate the power

-with the above experiment, the first geothermal plant in usa started in 1922 with a capacity of 250 kilowatts

-however, in 1946 first ground-source geothermal heat pump installed at commonwealth building in portland, oregon

-during the 1960’s, pacific gas and electric began operation of first large scale geothermal power plant in san francisco, producing 11 megawatts

-in 1973, when oil crisis began many countries began looking for renewable energy sources and by 1980’s geothermal heat pumps (ghp) started gaining popularity in order to reduce heating and cooling costs

-as effect of climate change started showing results, governments of various countries joined hands to fight against it, for which kyoto protocol was signed in japan in 1997, laid out emission targets for rich countries and required that they transfer funds and technology to developing countries, 184 countries have ratified it

hope this

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A 0.5 kg mass moves 40 centimeters up the incline shown in the figure below. The vertical height of...

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