First slide

Potential energy

Question

The given graph shows variation of potential energy with respect to position of the particle. The total mechanical energy of particle is also represented in the graph, region in which existence of particle is not possible

Moderate

A

0 < x < a
B

a < x < b
C

b < x < c
D

c < x < d

Solution

Mechanical energy = K + U. Since K ≥ 0, M.E ≥ U. Potential energy 'U' can be positive, negative or zero, but it can never exceed M.E. so option (3) is right.

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