Question

please answer fast.. it is urgent... ​

Answer 1

Answer:

a kWh

b The kinetic energy in a wheel's rotational motion turns out to be equal to one half the wheel's rotational mass times the square of its angular speed. Fast-spinning wheels can therefore carry enormous kinetic energies, even when they're rotating in place.

Answer 2

Answer:

${a}. \: kw$

${b}. \: Kinetic energy$