Question

choose the correct answer. why is work output always less than work input? because work input does not affect work output because friction or other forces oppose the effort force resulting in less efficiency

Explanation:

To determine why work output is less than work input, we analyze the options. The first option is incorrect as work input does affect output. The second option is correct because in real - world scenarios, forces like friction oppose the effort force. This opposition means that not all the input work is converted into useful output work, which leads to less efficiency and thus work output being less than work input.

Answer:

because friction or other forces oppose the effort force resulting in less efficiency