There is a lever. The fulcrum is 1 m from the left end, and 3 m from the right end. A block of 60 N is hung to the left end. To keep the lever in horizontal, how much force is needed on the right end?

F = 20 N

Explanation:

It is given that,

The fulcrum is 1 m from the left end, and 3 m from the right end. A block of 60 N is hung to the left end. We need to find the force needed on the right end such that it balances it. The torque acting on the left end is equal to the torque acting on another side. Let F is the force needed on the right end. So,

So, the force of 20 N is needed on the right end.

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-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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