can anyone give me an example of input and output force on a lever?

Question

like a picture or something like that

Answer 1

Check the wiki article, and find the forces you're looking for. Look at the picture under "first class lever", the finger pushing down is the "input force"

Answer 2

Probably the most common example would be a jack for a vehicle.
A relatively small force over a large distance on the handle and one can easily lift a 3000 lb. vehicle.
The distance sacrifice is a small price to pay for the upward force exerted on the vehicle.

Answer 3

It is a sewsaw with a fulcrum under it.The long distance with small force is input force and the short distance with large force is output force.
Long Distance x F1 = Short Distance xLOAD