Answer:
To lift heavy object by applying less amount of force
Explanation:
A lever is usually defined as a long and hard rod, with a fulcrum that is needed to place near the object in order to lift it. This is has a great mechanical advantage as less amount of force is needed to apply in order to lift a heavier object.
The longer beam helps in lifting the heavier objects. It is very widely used.
The object that is lifted or needed to lift is considered as load and the amount of force required to lift the load is called effort.
