Question

a lifting machine is a device that use a small force over a long distance to move a large weight over a small distance true or false

Answer 1

True

lifting machines are just a special case of simple machines where we use small forces to lift large weight over small distances.

See here the work done remains same, by using a lifting device what we do is we just apply small force over a large distance instead of applying large force over small distance so that the work done that is the product of applied force x distance remains same in both the cases but with the help of lifting machines we just convert that bigger force into smaller force that can be easily applied.

This conversion is usually defined as a mechanical advantage.

One classical example of this is lever Mechanism where we can lift the weight on the smaller arm by applying small force on the bigger arm.

If you have further doubts please do post comments and if its all clear please give positive feedback. Thanks