Simple machines · सरल मशीनें
A free Physics lesson for Class 4 children.
A simple machine is a tool that makes our work easier.
A lever is a bar that turns on a fixed point called the fulcrum.
We push at one end. This push is the effort. The weight we lift is the load.
A see-saw, a pair of scissors and a bottle opener are levers.
A ramp is an inclined plane. It helps us move heavy things up.
A knife and an axe are wedges. They cut or split things.
A pulley is a wheel with a rope. It helps us lift things, like water from a well.
A screw holds things together. A wheel and axle helps things move.