Can energy change in physical change

“Physical changes involve small changes in energy and are easily reversible. A chemical change may involve a decomposition or synthesis reaction. During chemical change, the mass and number of atoms is conserved, but the number of molecules is not always the same. Chemical reactions involve larger changes in energy.” (open stacks) hope this helps!

Electoral current force mechanical advantage if the wheel and axle is 2 n and the output force is 20 n