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Physics 12 Online
OpenStudy (anonymous):

How to calculate power if you have the height, time and mass?

OpenStudy (mos1635):

need more input.......

OpenStudy (shayaan_mustafa):

\[power=\frac {work}{time}\]\[power=\frac {force*height}{time}\]\[power=\frac {mass*gravitational acceleration*height}{time}\]or in easy way we can write it as.\[power=\frac {mgh}{t}\]

OpenStudy (shayaan_mustafa):

where\[\large 9.8m/s ^{2}\]

OpenStudy (anonymous):

But why is it mass * gravitational * acceleration?

OpenStudy (shayaan_mustafa):

according to newton's 2nd law of motion F=ma but when we talk about height then a=g so f=mg i.e. force=mass*gravitational acceleration

OpenStudy (anonymous):

So instead of Force Net = ma we use Force of gravity - mg. Just making sure. Thank You So Much!

OpenStudy (anonymous):

=*

OpenStudy (shayaan_mustafa):

when we say f=mg then this force is reffered to as weight. i.e. w=mg where w is a force due to earth's gravity.

OpenStudy (anonymous):

Okay THANK YOU SO MUCH!

OpenStudy (shayaan_mustafa):

you are ever welcome.

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