The answer to the question is 15 kinetic energy
The property that compares the mass of an object with its volume is density.
Rubber is a insulator so current cannot pass through it where as metal is a conductor which allows current to pass through it
Answer:
Because the mechanical advantage of the machine is affected by friction and weight but velocity ratio is not. So, mechanical advantage is less than velocity rate. Thus, the machine's efficiency is less than 100% and can't be a perfect machine
