3. A large crane lifts a 25,000 kg mass in the air. The amount of work that must be done by the crane’s lifting components is 2.2 X 10

Question

3. A large crane lifts a 25,000 kg mass in the air. The amount of work that must be done by the
crane’s lifting components is 2.2 X 10’J (Wo). If the efficiency of the crane is 22%, how much
useful work is done on the mass (Wou)?

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Thiên Ân 4 years 2021-08-20T00:18:29+00:00 1 Answers 43 views 0

Answers ( )

  1. giabao
    0
    2021-08-20T00:20:11+00:00
    Reply

    \mathfrak{\huge{\orange{\underline{\underline{AnSwEr:-}}}}}

    Actually Welcome to the concept of Efficiency.

    Here we can see that, the Input work is given as 2.2 x 10^7 J and the efficiency is given as 22%

    The efficiency is => 22% => 22/100.

    so we get as,

    E = W(output) /W(input)

    hence, W(output) = E x W(input)

    so we get as,

    W(output) = (22/100) x 2.2 x 10^7

    => W(output) = 0.22 x 2.2 x 10^7 => 0.484 x 10^7

    hence, W(output) = 4.84 x 10^6 J

    The useful work done on the mass is 4.84 x 10^6 J

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Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )