A 2.5-kg book slides horizontally and falls from a shelf 3.0 m above the floor. How much work does the force of gravity do on the book as it falls 3.0 m?
1 Answer
May 1, 2018
I tried this:
Explanation:
We know that work is:
where:
During the horizontal motion the force (gravitational pull=weight) and the horizontal displacement form an angle of
Only during the fall where force and displacement have the same direction and so
We finally get: