All Questions
3
questions
0
votes
1
answer
86
views
Is the product between proportionality constant and vector defined?
$$
\delta {U} = - \int F \cdot ds
= -k \int s \cdot ds
= -1/2 ks^2 \tag{i}$$
In ($i$) is there is a dot product between spring constant $k$ and deviation $s$?
Correct me if I am ...
0
votes
3
answers
499
views
How do I get the negative sign in the expression for Gravitational Potential Energy?
From universal law of gravitation, gravitational force exerted on a body of mass m by another body of mass M is
$$ \mathbf F = \frac{GMm}{x^2} $$
where x is the distance between the ...
-1
votes
2
answers
91
views
Problem with derivation of potential enery of two body in Gravitational energy
Maybe what I'm going to ask sounds stupid but it means a lot to me that's why I'm asking. I've problem with just a single step in derivation.
Let's start. I'm keeping in mind the direction of each ...
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