Chapter 6: Work and Energy
10) On a plot of Force versus position (F vs. x), what represents the work done by the force F?
A) the slope of the curve
B) the length of the curve
C) the area under the curve
D) the product of the maximum force times the maximum x
Answer: C
Diff: 1 Page Ref: Sec. 6.2
11) The quantity 1/2 mv2 is
A) the kinetic energy of the object.
B) the potential energy of the object.
C) the work done on the object by the force.
D) the power supplied to the object by the force.
Answer: A
Diff: 1 Page Ref: Sec. 6.3
12) If the net work done on an object is positive, then the object's kinetic energy
A) decreases.
B) remains the same.
C) increases.
D) is zero.
Answer: C
Diff: 1 Page Ref: Sec. 6.3
13) If the net work done on an object is negative, then the object's kinetic energy
A) decreases.
B) remains the same.
C) increases.
D) is zero.
Answer: A
Diff: 1 Page Ref: Sec. 6.3
14) If the net work done on an object is zero, then the object's kinetic energy
A) decreases.
B) remains the same.
C) increases.
D) is zero.
Answer: B
Diff: 1 Page Ref: Sec. 6.3
106
10) On a plot of Force versus position (F vs. x), what represents the work done by the force F?
A) the slope of the curve
B) the length of the curve
C) the area under the curve
D) the product of the maximum force times the maximum x
Answer: C
Diff: 1 Page Ref: Sec. 6.2
11) The quantity 1/2 mv2 is
A) the kinetic energy of the object.
B) the potential energy of the object.
C) the work done on the object by the force.
D) the power supplied to the object by the force.
Answer: A
Diff: 1 Page Ref: Sec. 6.3
12) If the net work done on an object is positive, then the object's kinetic energy
A) decreases.
B) remains the same.
C) increases.
D) is zero.
Answer: C
Diff: 1 Page Ref: Sec. 6.3
13) If the net work done on an object is negative, then the object's kinetic energy
A) decreases.
B) remains the same.
C) increases.
D) is zero.
Answer: A
Diff: 1 Page Ref: Sec. 6.3
14) If the net work done on an object is zero, then the object's kinetic energy
A) decreases.
B) remains the same.
C) increases.
D) is zero.
Answer: B
Diff: 1 Page Ref: Sec. 6.3
106
