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Create a spreadsheet to record data from 'A Lifting Experience'.
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Discover how much work is done to move a box of books weighing
2N from the floor onto a shelf 0.8 m above the floor? (W=F x d)
W= 2.0 N x 0.8 m, or 1.6 joules.
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Explain mechanical advantage when you use a ramp 4 m long to help
move the box of books onto the shelf. (The amount of work does
not change, but mechanical advantage of the ramp, MA = 4m/0.8m;
or MA = 5, does reduce the force needed to raise the box of books.
- Students
will convert their weight from pounds to newtons by multiplying
their weight in pounds by 4.448.
- How
many joules of work will be required to move 75 books from the
floor to a shelf 6.6 feet high if each book requires a force of
2 N to lift? (answer: 2 N x 2 m x 75 books = 300 joules).
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