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