Question

Simple work question: I have a ping pong ball that weighs 2.7g - I have to lift the ping pong ball 10cm. How much work?

Answer 1

Work = Force x distance if I recall

distance is easy that is 10cm or .1 meters
but I don't remember how to do Force...mass(weight in this case)....in some kind of relation with the acceleration of gravity...oh lifting straight up: I know that matters. Hope someone can help.

Answer 2

Force = mass times accelleratn
therefore F = ma
W = mgdeltay = (2.7)(9.8)(.1) = 2.646 J = 2.6 J

Answer 3

I knew it was easy ---thanks