Device 1: Hand-Crank Flashlight (Required)
Have you ever used a hand-crank fashigh? You ma
crank on the outside of the flashlight and the caktua
generator inside the fashight. A generator is a machine that
stores energy by charging a battery. When the generators, it
converts kinetic energy to electrical energy and then stores it in
a battery as potential energy. The potertial energy stored in the
battery can be used right away or saved for later. The energy
that powers the light comes from the battery-but before that,
came from you. When you use a hand-crank fashlight, you are
using your body's energy to power alighe

What actions or motions power this kind of
device?

The disadvantage of a hand-crank fashlight is that you have to turn the crank in order to charge the
battery. The longer you plan to use the fashight, the more energy you need to store and the more cranking
you have to do. However, turning a crank isn't the only way to
store energy in a generator. There are lots of other ways to
release kinetic energy bouncing, stretching, compressing, and
other forms of motion all involve kinetic energy, which means
they can be used to turn a generator and store electrical
energy in a battery. Now imagine if those motions allowed you
to charge that battery just by doing everyday activities-things
you have to do anyway, Ike walking Some people have
invented devices that do just that convert kinetic energy from
everyday activities into electrical energy, storing the energy in
batteries as potential energy that can be used to power

What is an advantage of this device?

What is a disadvantage of this device?