Ask Question
1 November, 12:13

You did 150 joules of work lifting a 120-newton backpack.

a. How high did you lift the backpack?

b. How much did the backpack weigh in pounds?

+5
Answers (1)
  1. 1 November, 12:29
    0
    In the given question, we already know

    Work done = 150 joules

    Force = 120 Newton

    Now we know from the study of physics that

    Distance (D) = Work done / Force

    (a) To find the height upto which the backpack has been lifted,

    D = Work done / Force

    = 150 / 120

    = 15 / 12

    = 5 / 4

    = 1.25

    So the backpack was lifted to a height of 1.25 metres.

    (b) Now we have the find the weight of the backpack in pounds

    We know that 1 pound = 4.448 Newton

    So if

    4.448 Newton = 1 pound

    Then

    120 Newton = (120 / 4.448) pounds

    = 26.978 pounds

    So the backpack weighed 26.98 pounds.
Know the Answer?
Not Sure About the Answer?
Get an answer to your question ✅ “You did 150 joules of work lifting a 120-newton backpack. a. How high did you lift the backpack? b. How much did the backpack weigh in ...” in 📙 Physics if there is no answer or all answers are wrong, use a search bar and try to find the answer among similar questions.
Search for Other Answers