need help plz Hand-cranked flashlights transform mechanical energy into other forms of energy. Which energy transformations are useful, and which are not? Explain why most hand-cranked flashlights are made with LEDs.
some kinetic energy to electric energy are good. for a hand cranked flash light it takes a lot of physical energy to get the light on for a large amount of time. LEDs are used because they are bright with even a little energy. solar/light energy is very useful aswell
