Questions tagged [physics]
Questions on the mathematics required to solve problems in physics. For questions from the field of mathematical physics use (mathematical-physics) tag instead.
6,007
questions
-4
votes
1
answer
1k
views
Find the distance covered by the ant [closed]
A $15 \text{ cm}$ long line of ants starts crawling. A rebel ant at the back of the line steps out and starts marching forward at a higher speed than the line is moving. On reaching the front of the ...
- 878
-4
votes
1
answer
130
views
Oscillating Object - Homework [closed]
I am forced to post this question here as physics SE refuses homework questions even if tagged with their (severely misleading) 'homework' tag. See my question at: https://physics.stackexchange.com/...
- 1,966
-4
votes
1
answer
333
views
d/d(rsin(theta)cos(phi)) = ???
What does $\frac{d}{d(r\sin(\theta)\cos(\phi))}$ equal? I am very confused because if the function were in the numerator, not the denominator, it would make perfect sense to me (i.e., $\frac{d(r\sin(\...
- 7
-4
votes
1
answer
52
views
Factoring sin + cos [closed]
I can't understand how to isolate the tan(x) in the Excercise. Can you please show me the passages.
If $\tan{\theta} \geq 1$, then
$$
\sin{\theta} - \cos{\theta} \leq \mu (\cos{\theta}+\sin{\...
- 3
-4
votes
1
answer
122
views
Using Hooke's Law to find the distance a spring is moved [closed]
A 150 lb person sits on a spring-mounted chair whose spring has a stiffness of 200 lb/in. How far does the chair sink when the person sits down?
To set up this problem I would use Hooke's Law: $F(x)...
- 1,813
-4
votes
1
answer
67
views
Is speed relative? [closed]
I'm not a mathematician and this is something that I've pondered for years...
If I'm travelling at 1 mile per hour, and a car beside me is travelling 2 miles per hour it will (obviously) overtake me. ...
-4
votes
1
answer
3k
views
Finding the distance between two moving objects
In this case there is a missile whose initial position is $A(30,40)$ with a velocity of $[50,30]$ and an asteroid whose initial position is $B(400,250)$ with a velocity of $[-20,-30]$. The position of ...
- 77