how can u easily explain levers input force???

Question

i need to find out how levers forces work

Answer 1

All you need to know about levers

Given a beam of length L
Pivot located at length x from the left.
Forces applied F1 on the left and F2 on the right.
F1 is applied and is just about to match the torque produced by F2. Equation of torque or moment is

T=r x F (x designates vector cross product)
and in this case the sum of the moments about the pivot point is zero and can be written as

T1+T2=0 so
xF1 + =0
The relationship between F1 and F2 is
F1=-(L-x)F2/x
Conclusion the longer arm of the lever (radius of rotation) we have the less force is required.

For more types and classes of levers see ref. below

Answer 2

Try opening your textbook and reading it.