All Questions
3 questions
-2
votes
3
answers
57
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Work energy and power [closed]
I saw this in a textbook and I want to confirm if it's true
If a body of mass m rolls down an
inclined plane of height h and length l (hypotenuse), the work done is mgh. It is the vertical height of ...
- 17.1k
1
vote
1
answer
46
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Defining Free Fall: Does Gravity Need to be the Sole Force Present?
Can a scenario be considered free fall in physics if the work done by forces other than gravity is zero, but those forces are still present? Or is it necessary for gravity to be the only force present ...
- 1,805
0
votes
2
answers
206
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Is there a mistake in this example in my mechanics textbook?
This is a worked example in my mechanics book:
But I think this worked example is wrong. In the 6th line. shouldn't $X=4R$ as the expression for distance above the surface is $(X-R)$ and when the ...
- 1,797