(b)
(c)
(d)
Fig. 6.46
for the given energy. Also, indicate the
minimum total energy the particle must have in each case. Think of simple
physical contexts for which these potential energy shapes are relevant.
Answer:
Total energy, E = K. E. + P. E.
K.E. = E ? P.E.
The particle can exist in such a
region in which its K.E. is positive.
(a) For 
K.E. is
negative. The particle cannot exist in the region 
. Here 
.
(b) In every region of the
graph, 
.
K.E. is
negative. The particle cannot be found in any region. Here 
.
(c) For x < a and 
K.E. is
negative. The particle cannot be found in the region 
and 
. Here .
(d) For 
and 
.
K.E. is
negative. The particle cannot be present in these regions. Here .
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