WorksheetsLesson 5.5
Total questions: 10
Worksheet time: 5mins
A pair of dogs are walking on a treadmill at a constant velocity. Which statement best describes whether or not the corgi's are doing work?
The dogs will eventually get tired, so work is being done.
The dogs are enjoying themselves so they are no work is being done.
The dogs are applying force to the treadmill, so there is work being done.
The velocities of the dogs are not changing, so the net work done is 0J
Which of the following best describes the work that is done in the image?
When the cat pushes against the bed it does work to jump forward.
When the cat is moving forward it does work to change its position
When the cat jumps off the bed, the bed does work to remain stationary
No work is done in this video because no money is shown in the video.
At the bottom of the slope, the skier starts with 35,000 J f Kinetic energy. Watch the animation and identify which of the following statements shows how much work the unpacked snow does on the skier.
15,000 J of work is being done in the positive direction
35,000 J of work is being done in the negative direction.
50,000 J of work is being done in the negative direction
0 J of work is being done. The skier is clearly on vacation.
If the skier has a mass of 65 kg. How much work is being done by gravity as they ski down the slope? Reminder: Find initial and final KE. KE=0.5⋅m⋅v2
33,072 J of work is being done by gravity.
1,036.75 J pf work is being done by gravity
1,074,850.56 J of work is being done by gravity
0.0000076 J of work is being done by gravity.
The steam engine on an old river boat burns coal to release 13,942 J of energy. If 11,938 J of heat are wasted in the process, how much work did the engine do?
0.86 J of work
2004 J of Work
11,938 J of work
25,880 J of work
An old fashion train burns fuel to produce 17,524 J of energy. If it does 3,785 J of work, how much waste heat was produced?
4.63 J of waste heat
11,938 J of waste heat.
13,739 J of waste heat
21,309 J of waste heat
A new steam engine is being tested. When the engine runs it produces 6,543 J of waste heat and 2,109 J of work. What was the total input energy of the engine?
8652 J of energy
4434 J of energy
0.32 J of energy
3.10 J of energy
The steam engine on an old river boat burns coal to release 12,345 J of energy. If the engine produces 6789J of work, what was the efficiency of the engine?
75 %
25 %
189%
55%
An old fashion train with an efficiency of 25% burns fuel to produce 16,000 J of energy. How much work does it do?
20,000 J of work
640 J of work
12,000J of work
4000 J of work
How much energy was needed at the start if a jet engine with an efficiency of 89% produces 10,000J of work?
10,000 J
8,900 J
11235.96 J
9,911 J
