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Quiz: Work, Power And Energy

12 Questions  I  By Songj2
Practice quiz for chapter 7.

  
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Question Excerpt

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1.  A solar collector heats the water in the water tank of a home. Which energy transformation equation best describes this situation?
A.
B.
C.
D.
E.
2.  The amount of work done when a 80.00-kg person jumps 1.000 m into the air in 0.5000 s is
A.
B.
C.
D.
E.
3.  The amount of work done to stop a bullet travelling through a tree trunk a distance of 50 cm with a force of 2.00 ´ 102 N is
A.
B.
C.
D.
E.
4.  A person lifts a pail of water of mass of 1.50 kg from the ground to a deck, 1.00 m above the ground. How much work was done by gravitational force on the pail of water?
A.
B.
C.
D.
E.
5.  In which case is negative work done?
A.
B.
C.
D.
E.
6.  In which case is positive work done?
A.
B.
C.
D.
E.
7.  An elevator motor lifts a load of 2500 kg a height of 12.0 m in 3.00 seconds. The energy required by the motor to accomplish this task is 300 000 J. What is the efficiency of the elevator?
A.
B.
C.
D.
E.
8.  In the following figure, a 0.60-kg ball is about to fall to the step below.  The gravitational potential energy of the ball relative to the step is
A.
B.
C.
D.
E.
9.  Jughead (m = 60 kg), Archie (m = 65 kg), and Reggie (m = 70 kg), all decide to run up a flight of stairs at with a height of 4.0 m at constant speed at good ol’ Riverdale High.  If all three achieve this task in a time of 3.5 seconds, who generates the most power?
A.
B.
C.
D.
E.
10.  During a recent NBA basketball game, Jose Calderon, a guard with the Toronto Raptors, threw a basketball into the crowd in an unsportsmanlike manner.  Which one of the following statements about the basketball is FALSE?
A.
B.
C.
D.
E.
11.  Nicholas exerts a certain force to lift a dumbell 3.0 m straight above his head in 20 s. If he had completed the same task in 10 s, the energy he would need to use would be
A.
B.
C.
D.
E.
12.  If Elio pushes against an immobile wall with twice as much force as Jordan, which of the following is TRUE?
A.
B.
C.
D.
E.
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