Mathematics Stack Exchange
Mathematics Stack Exchange

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.

This tag is for questions on the mathematics required to solve problems in physics and should not be confused with those on physics concepts. Pure physics questions should go in the Physics Stack Exchange. For questions in the field of mathematical physics, please use the tag instead.

5951 questions
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Calculate maximum possible velocity, given D, V0, A, J

I'm writing a program that controls space ship. I needed to determine total travel time for the following scenario: ship has some initial velocity V0 ship needed to travel distance D with maximum possible velocity, but have zero V at the end of the…
simps
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Calculate launch angle of projectile

I'm creating a game and am having trouble designing aiming system for AI. How do I calculate all angles at which the projectile can be launched from point $T_0(x_0,y_0)$ with launch velocity $v_0$ to reach the point $T_1(x_1,y_1)$ given the gravity…
Mirac7
  • 305
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Rate of change question (planes, kites and the such)

Q: A kite $100 \ m$ above the ground moves horizontally at a speed of $8 \ m/s$. At what rate is the angle between the string and the horizontal, i.e. e the ground, decreasing when $200 \ m$ of string has been let out. The only part I am having…
Chris
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How do you scale the change of a period over time?

I am writing a game, and I have a period (a repeating cycle) which is mapped to the scrolling of a background. I want to change this period, so that the scrolling is faster or slower--- but if I just change the period, the background's x position…
patrick
  • 221
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How to find time of man running? (motion formulas)

So for this question there is a man running through a section of grass 1.14375m long at a speed of 3m/s. How do i find his time do i assume the initial velocity is 0? Because that is the only way it works. If i do that i use to find acceleration v^2…
user151764
  • 301
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Calculating speed of free fall object

do i use this formula h=0.5gt² ? Given height is 9144mm (30,000ft) Given weight is 60kg how do I find the speed of falling? and time taken to reach the ground.
BeyondProgrammer
  • 101
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A object was fired from ground with initial angle $\theta$

so i got that , a object was fired from ground with angule $ \theta $. when the object get the height equal to half of his max height , the velocity of object is $\frac{3}{4}$ of initial velocity.Find the initial $\theta$ . i Tryed this way $$h_{1}…
Rogers
  • 149
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Gauss' law of electrostatics

State Gauss' law of electrostatistics. A spherical charge distribution has a volume charge density given by $$\rho= \left\{ \begin{array}{lr} \rho_0\left(1-\frac{r^2}{a^2}\right) & 0 \leq r \leq a\\ 0 & r>a \end{array} …
user2285560
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How do I compute speed based on acceleration and drag?

I'm interested in simulating the (one-dimensional) speed and position of a car. How can I compute the speed $v(t)$ given initial speed $v_0$, acceleration $a(t)$ (I don't want to assume that it is constant) and a drag independent of the time and…
Jean-Philippe Pellet
  • 103
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Physics problem on angular momentum

Problem. A thin, uniform metal bar, 2.00 m long and weighing 90.0 N, is hanging vertically from the ceiling by a frictionless pivot. Suddenly it is struck 1.50 m below the ceiling by a small 3.00-kg ball, initially traveling horizontally at 10 m/s…
Paze
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Need help deciphering equation that was messed up when used on a thread online

How can I understand what this says? Can someone also tell me what the heck those symbols mean and where they came from? $$\vec{p_e} = 1200 kg \cdot 5 m/s [{1 \over \sqrt{2}} , {1 \over \sqrt{2}}] \\ \vec{\Delta p} = \vec{p_e} - \vec{p_f} = 1200…
Ali Mustafa
  • 329
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Oscillation and Damped oscillation program

I am trying to build a simple program where an object undergoes simple harmonic motion, where a force is initially applied, than undergoes SHM until coming to a stop. My problem is that my program runs forever without the object ever stops,(as if…
JLL
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Pascals to PSI formula

Could somebody give me a formula to convert Pascals to PSI? I understand that you probably have to convert Pounds of Force to Newtons. But where do I go from there?
Rob_IGS
  • 111
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Solve for time, given distance and acceleration

Two gangsters are flying down I-70 West at a constant 108 hm/hr. If they make it to Indiana, they will be safe. When they are 1 km away from the Indiana border, while still traveling at a constant 108 km/hr, they pass a concealed police car hidden…
Brian Lindsey
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Car acceleration with gear shifting

I'm making a web game that requires a player to change gears at the proper RPM zone to win the race. If the player misses the prime RPM zone he will be slowed down by a factor relative to the distance he was away from the prime RPM zone. The 'prime'…
novs12
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