Question

Which principle of work is applied to a machine?

• A. For an ideal machine, the work done by the machine is always equal to the work done on it.
• B. For an ideal machine, the work done by the machine is always greater to the work done on it.
• C. For an ideal machine, the work done by the machine is always less to the work done on it.
• D. For an ideal machine, the work done by the machine is never equal to the work done on it.

Answer 1

The correct option is A

For an ideal machine, the work done by the machine is always equal to the work done on it.

When an energy is supplied to a machine, it is able to do some useful work. The useful work done by the machine is always less than the work done on it. For an ideal machine, the work done by the machine is always equal to the work done on it. This is called the principle of work as applied to a machine.