Please answer the following four statements, with one of the three options posit

Question

Please answer the following four statements, with one of the three options positive, negative or zero.

When the kinetic energy of a system is transformed to potential energy of the system, the work done on the system is When the potential energy of a system is transformed to thermal energy of the system, the work done on the system is When the kinetic energy of a system is increased by transfers to the system, the work done on the system is When the potential energy of a system is decreased by transfers from the system, the work done on the system is

Explanation / Answer

1) Zero , Reason - Conservation of Energy
2)Negative, Reason - As the total Energy is decreasing.
3)Positive, Reason - Work Energy Theorem , Work done on system results in increase in Kinetic Energy.
4)Negative, Reason - As the total Energy is decreasing.

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