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Results tagged with reference-frames
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user 238871
A reference frame is a particular coordinate system chosen to represent physical entities. The notion is most often used in special and general relativity to denote particular coordinates chosen on the spacetime manifold.
2
votes
When do I use the cosine and sine functions when graphing the components of a vector?
Recall the triangle law of vectors.
To find the x and y components, construct a triangle with the vector $F_e$ as the hypotenuse.
This is where trigonometry comes in- since $F_{ex}$ is the base of the …
- 303
1
vote
Two rockets, A and B, are initially close together and on the same axis but facing in opposi...
The law of conservation of momentum would apply here, as you would have guessed.
So the initial momentum of the eject will be equal to the final momentum of fuel and rocket combined. That mass will be …
- 303
0
votes
Parallel Axis Theorem Derivation
The centre of mass is defined such that the sum of mass moments about it is zero.
Recall how the CoM was defined:
$$
M\vec{r}_{cm} = \sum_{all}m_i\vec{r}_i
$$
M can be written as $\sum_{all}m_i$. The …
- 303