Question

ce
Tal
ked
(4) n
27. 10 identical cubes each of mass 'm' and side 'L' are
on a floor. If the cubes are arranged one over the
other in a vertical stack, the work to be done is
(1) 45 mg
(2) IgL
10 m
the
ght
the
s
mghar
7 mgL
m2 max

Answer 1

the cubes are stacked one over another so work done on

1 = 0

2 = mgl

3 = 2mgl

4 = 4mgl

5 = 5mgl

:

:

:

:

:

toal work done = mgl+2mgl+3mgl+4mgl +.............+9mgl

= 45mgl