# At time ti, the kinetic energy of a particle is41.1 J and its potential energy is 11.9 J. Atsome later time tf , its kinetic energy is 18.2 J and 34.8 J for potential energyIf the potential energy at time tf is 7.54 J,what is the work done by the nonconservativeforces acting on the particle?Answer in units of J.

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At time ti
, the kinetic energy of a particle is
41.1 J and its potential energy is 11.9 J. At
some later time tf , its kinetic energy is 18.2 J and 34.8 J for potential energy
If the potential energy at time tf is 7.54 J,
what is the work done by the nonconservative
forces acting on the particle?

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Step 1

The work-energy theorem gives, help_outlineImage TranscriptioncloseK U,+W K+U Here, K, is the initial kinetic energy of the particle, U, is the initial potential energy of the particle, W is the work done by the non-conservative force, K, is the final kinetic energy of the particle, U is the final potential energy of the particle Rewriting the above equation, W K, +U,-(K,+ U,) fullscreen
Step 2

Substitute the values in the above equation consider...

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### Work,Power and Energy 