Can you give me some examples of power problems? ?

Question

Can you give me some examples of power problems? ?

Answer 1

1) Sam and alex have the same mass(60kg).sam takes 10 seconds to walk up flight of stairs (20 meter vertically) while Alex needs 20 seconds.

  Calculate the power generated by Sam and Alex.

  

answer

sam = 12000W

alex  = 600W

Answer 2

Power is the energy generated or consumed in your defined period of time,calory/second, ,jouls/sec(watts,) they are interchangable.

Answer 3

The Oil Industry

The Hydro Industry

Gov'ts

they all have power problems over our world :)

hahahaha....cya

Answer 4

please provide some more details.

will be glad to help!

:-)

Answer 5

power = work / time (joules per second)

when you lift a 1kg bag up to put it on ur 2 metre high shelf over 2 seconds -

work = f * d = 1 * 9.8 * 2 = 19.6 joules

work = 1 kg * gravity * 2 seconds = 19.6 joules

power = 19.6 / 2 = 9.8 watts

power = 19.6 / 4 = 4.9 watts

over a longer time youre doing the same amount of work but using less power.

when your car engine revs higher, its doing more work (converting chemical to mechanical energy) therefore you go quicker.

another formula for power = force * velocity

i.e P = FV