
Efficiency in Physics - IB Physics
Interactive Video
•
English
•
10th Grade
•
Hard
Brandon Lopez
FREE Resource
4 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the efficiency of the forklift?
4.1 %
0.245%
24.5%
75.5%
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How much total energy does the light bulb use?
15 J
240 J
864,000 J
0.004 J
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How much energy is "lost" to heat? (Since we are not trying to use the bulb to produce heat, only the light energy it produces is considered "useful")
820,800 J
9,095 J
43,200 J
172,800 J
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How much energy does the car need to use to accelerate from 10 m/s to 20 m/s considering that the engine is only 30% efficient?
160,000 J
533,333 J
36,000 J
400,000 J
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