Part A Which of the following statements isare true? Check all that apply. A pot

Question

Part A Which of the following statements isare true? Check all that apply. A potential energy function can be specified for a conservative force. The work done by a nonconservative fo depends on the path taken. D The work done by a conservative force depends on the path taken. A nonconservative force permits a two-way conversion between kinetic and potential energies A potential energy function can be specified for a nonconservative force. A conservative force permits a two-way conversion between kinetic and potential energies.

Explanation / Answer

Part A)

The true statements are

A potential energy function can be specified for a
conservative force.

Reason : it can't be specified for a non conservative force since it is path dependent

A conservative force permits a two-way conversion between
kinetic and potential energies.

Reason : in non conservative forces energy may be lost in friction and other forms

The work done by a nonconservative force depends on the
path taken.

Reason : for conservative force it is not path dependent

Question 8.04)

The true statements are

The total mechanical energy of a system, at any one instant,
is either all kinetic or all potential energy. FALSE

Reason : although sometimes it could be possible but not always possible
The total mechanical energy of a system is constant only if

conservative forces act. TRUE
The total mechanical energy of a system is equally divided
between kinetic and potential energy. FALSE

Reason : sometimes it could be possible but not always possible
Mechanical energy can be dissipated to nonmechanical
forms of energy. TRUE
The total mechanical energy of a system is constant only if

nonconservative forces act. FALSE

Reason : if non conservative forces act then energy of the system may be lost in the form of heat

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