Q.

What happens to the energy of a particle, in SHM, with time in the presence of damping forces?

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a

Stays constant

b

Decreases linearly

c

Decreases exponentially

d

Decreases cubically

answer is C.

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Detailed Solution

Energy in presence of damping forces is given by: 1/2kA2e-bt/m. This shows that kinetic energy decreases exponentially with time.
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