Question

Which one of the following statement is true for an ideal 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 than the work done on it.
• C. For an ideal machine, the work done by the machine is always less than 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, but for an ideal machine, the work done by the machine is always equal to the work done on it.