All Questions
4
questions
0
votes
3
answers
239
views
A question about relative motion and how to make sense of it
So, here is the question:
Assuming the 2D Cartesian system and the basis vectors $\hat{i}$ and $\hat{j}$, we have two cars A and B located at (0,6) and (-30,0) respectively. Car A starts moving with a ...
- 169
1
vote
1
answer
124
views
Velocity of an object with respect to the same object
I know that velocity of an object with respect to the same object is a null vector but I'm not able to get a grasp of it.
Whatever I had thought till now is that if I'm sitting in a train (which may ...
- 882
1
vote
1
answer
100
views
Signs in relative vector addition
So I know the formula for relative vector addition is
$$w = \frac{v-u}{1-\frac{uv}{c^2}}.$$
How do I chose when to use this formula or its inverse transformation for solving vector addition problems ...
- 33
0
votes
3
answers
76
views
Reference Frames
I observe two cars approaching each other from opposite directions and measure as 40 mph and 30 mph, respectively. How fast is the 40 mph car moving according to the driver in the 30 mph car? ...
- 19