The Books
a 2.0 newton block fals from atable 1.0 meters high. after falling 0.5 meter, the books kinetic engery is?
a)1.0 J
b) 2.0 J
c) 10J
d) 20 J
weight=mg
potential energy=mgd
potential energy at 1 meter=2*1=2
at .5 meter=2*.5=1
differnce=2-1=1jole
and since the sum of both kinetic and potenial enegy remains the same during the fall
the the change in kinetic energy=the change in potential energy=1 jole .and of course the block had 0 kinetic energy at the start since it was at rest.
which makes the kinetic enegy of the fallen block=1 jole.
choice : a
the books – smells like content
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