A machine designed to stretch a stiff spring uses 1,550 J of energy to stretch the spring. If the work output is 1,200 J, what is the machin

Question

A machine designed to stretch a stiff spring uses 1,550 J of energy to stretch the spring. If the work output is 1,200 J, what is the machine’s efficiency?

in progress 0
Khoii Minh 6 months 2021-08-27T20:58:19+00:00 1 Answers 3 views 0

Answers ( )

  1. trungdung22
    0
    2021-08-27T20:59:38+00:00
    Reply

    Answer:

    77%

    Explanation:

    efficiency= work output/work input X 100%

    e = 1,200j/ 1,550 j x100%

    e = 1,200/1,550= 0.77

    e = 0.77 x 100%

    e = 77%

Leave an answer

Browse

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