(a)
given that
U = 8.2 m/s
we know
M*U = (M + m)V
where M = 40 *m
so
V = M*U / (M+m)
V = 40*m*8.2 /41m
V = 8m/s
(b)
given that
dT = 8ms= 8*10^(-3) s
we know that
F = m*dV/dT
F = m*8/8*10^(-3)
F = 1000m
and
from above relationship
a = 1000 m/s^2
a = 1000/g = 1000/ 9.8 = 102.04 g's
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