Exam 4 Target 7 Retake Preap 16-17
.
- 1.If mechanical energy is conserved in a system, the energy at any point in time can be in the form of
- A.
A. kinetic energy.
- B.
B. gravitational potential energy.
- C.
C. elastic potential energy.
- D.
D. all of the above
- 2.Which of the following is not a form of mechanical energy?
- A.
A. kinetic energy
- B.
B. chemical potential energy
- C.
C. gravitational potential energy
- D.
D. elastic potential energy
- 3.Which of the following is a true statement about the conservation of energy?
- A.
A. Potential energy is always conserved.
- B.
B. Kinetic energy is always conserved.
- C.
C. Mechanical energy is always conserved.
- D.
D. Total energy is always conserved.
- 4.Friction converts kinetic energy to
- A.
A. mechanical energy.
- B.
B. nonmechanical energy.
- C.
C. potential energy.
- D.
D. total energy.
- 5.Why doesn’t the principle of mechanical energy conservation hold in situations when frictional forces are present?
- A.
A. Kinetic energy is not completely converted to a form of potential energy.
- B.
B. Potential energy is completely converted to a form of gravitational energy.
- C.
C. Chemical energy is not completely converted to electrical energy.
- D.
D. Kinetic energy is completely converted to a form of gravitational energy.
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