A uniform ladder of mass 5kg and length 2m carries a block of mass 2.5 kg attached to one end. When the ladder is moved from orizontal position to veritical position calculate the change in its gravitational potential energy.
gravitational potential energy, U = mgh
here,
m = 2.5 kg
h = 2m
so,
the potential energy acquired by the mass will be
U = 2.5 x 10 x 2
or
U = 50 J