Question

Which of the following statements is correct?

Options

• A machine has always output more than input.

• The mechanical advantage of a machine can never be more than one.

• If a machine gives a convenience of direction, its mechanical advantage is greater than one.

• For a given design of a machine, its velocity ratio is always a constant quantity

Answer 1

For a given design of a machine, its velocity ratio is always a constant quantity

Explanation:

The velocity ratio depends on the machine’s design and remains constant as long as its dimensions do not change. A machine cannot give more output than input, and its mechanical advantage can be greater than one.