4. An automobile gasoline engine is able to do 225 J of useful work with each stroke of its pistons. If the engine has an efficiency o

Question

4. An automobile gasoline engine is able to do 225 J of useful work with each stroke of its
pistons. If the engine has an efficiency of 29%, what is the amount of work that must be done on
the pistons in the engine?

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RobertKer 4 years 2021-08-20T00:09:45+00:00 1 Answers 49 views 0

Answers ( )

  1. minhkhang
    0
    2021-08-20T00:11:28+00:00
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    \mathfrak{\huge{\orange{\underline{\underline{AnSwEr:-}}}}}

    Actually Welcome to the concept of Efficiency.

    We know that, efficiency is given as,

    E (eta) = Output work / Input Work

    hence, here, E = 29% and Output work = 225

    hence, 29% = 29/100 in real..

    hence, the work done on piston is given as,

    29/100 = 225/I

    therefore, I = 225*100/29 ==> I = 22500/29 ==> I = 775.8 joules

    hence, the work done on the pistons is 775 J

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