SCIENCE
PHYSICAL SCIENCES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Yes, work was done
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No, work wasn’t done
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Either A or B
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None of the above
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Detailed explanation-1: -Examples of works : Pushing a car horizontally from rest; shooting a bullet (the powder does the work); walking up stairs; sawing a log. Was this answer helpful?
Detailed explanation-2: -Which of the following is the best example of work being done on an object? Work is force that transfers energy or movement between a system and its surroundings. In this case the work is moving the grocery bag.
Detailed explanation-3: -If the object is not moved even an inch by the applied force, then no work is said to be done. Some more examples of no work done are given below: You sit on a chair for hours. If a block moves on a smooth horizontal surface, no work is done.
Detailed explanation-4: -Power: You can walk up a flight of stairs or you can run up a flight of stairs. Either way you apply the same force through the same distance so you do the same amount of work.