Question

1-A pump lifts 420kg of water every minute through a verticL height of 30m (g=10n/kg)
A-calculate the potential energy gained by water every minute.
2-what are two factors related to buoyancy

Answer 1

1 we have,
mass,m=420kg
height,h=30m
gravitational force,g=10m/s2
Now,potential energy,P.E.=mgh
=420×30×10
=126000J
the two factors related to buoyancy are:-
1-density
2-weight