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.

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Soft ceiling game physics

I'm making a game that has physics. For now, I have a implemented drag and thrust (upwards acceleration): $ a_{t+1} = a_{th} (1 - (v_t / v_T)^ 2) $ (acceleration) $ v_{t+1} = v_t + \Delta t \space a_{t+1} $ (velocity) $ p_{t+1} = p_t + \Delta t…
propeller
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How to calculate the area of a 4 dimensional curve?

I have been searching on Google about it, and I found that given a sample, 4 points, per example, I could find a function and use integral on it. I am sorry if it sounds silly, I am very dummy in mathematics. How could I find the area of this…
marcelo-ferraz
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If a bead is suspended by 2 strings, one vertical, the other diagonally, why are the tensions equal?

I have a text book which gives two diagrams of beads suspended from strings with different angles, and worked examples to calculate the tension in the strings. The first bead is suspended by $2$ strings attached to a rod, both strings at angles to…
Tim Gradwell
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are force and acceleration approaching to infinity at collisiton time?

Suppose we have two balls or two boxes colliding or we hit a ball at rest, does this mean that the force and acceleration at the time of collision are close to infinity? Because at the time of collision the speed changes from 0 to specific speed in…
Aymen
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How we can find the velocity of the box at time 0?

If we push a box (mass of 2 kilograms) with a force of 4 newton, how we can find the velocity at t= 0 after pushing the box? i tried: a=f/M; then with integration => v(t) - v(0) = f/m * t; => v(0) = f/m * t +v(t), but we can't here
Aymen
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If you have a constant velocity over some time interval, how can you say that the average velocity is equal to that constant velocity?

My physics textbook claimed that if velocity was constant over an interval, then the average velocity was that constant velocity. The book used this to prove that the area under a curve with constant velocity is the displacement(since average…
Ankit
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I have calculated the prediction for the final angular velocity of a typical classroom demonstration and it is obviously wrong. Where is my mistake?

A typical classroom ball on a string demonstration of conservation of angular momentum starts at 2 rps and has the radius reduced to ten percent. $$L_2=L_1$$ $$L=mvr$$ $$m_2v_2r_2=m_1v_1r_1$$ $$m_2=m_1$$ $$v_2r_2=v_1r_1$$ $$\text {divide both sides…
John
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How to calculate the period of this pendulum

I have a pendulum with the following properties: The diameter of the sphere is 1 meter. The sphere of the pendulum is made of pure titanium. The pendulum is connected to the roof with a rigid string 12 meters long. It does not have mass. The union…
Antonio Gamiz Delgado
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Solving a simple equation

I am just starting to study physics and I found this equation: $$\ x = 8 - {6t} + t^2$$ If possible please explain in a step by step. Sorry if it's too simple.
Wahtever
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Calculate the bounce of an object falling from a height.

I would like to calculate the bounce of an object given three components: Force on impact, Mass and Velocity. What I mean is the following: When an object falls from a height, $\ V_0 = 0$, and $\ g=9.8$, in time 2 seconds with a mass of 50g, how…
sciencepi
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If energy is conserved then, why should we worry about energy crisis?

According to law of conservation of energy,"Energy can nither be created nor be destroyed but can be transferred from one form to other". If this is so, then why should we worry about energy crisis?
Aayush Karna
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Does the equation $Q = mc ∆T$ work in every scenario?

The equation for energy transferred to an is $ Q = mc\Delta T$ $Q$ = Energy Transferred $m$ = mass of the object $\Delta T$ = change in temperature This equation gives a linear energy to temperature ratio. Isn't it that when you get the temperature…
SubhanKhan
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What does it mean to "Evaluate the potential of leading order?"

Given the potential $V(r)$ of some particle $m$ that is affected by it, how does one use Newton's Second Law to evaluate the potential of leading order? I got the DE: $$mr''r^3=2b-ar,$$ where $a$,$b$ are constant and $'$ is time differentiation.
Frogfire
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Integral of velocity if acceleration is a function of velocity

I am having trouble taking the integral of this acceleration function: $$a = (b - v^2)/c$$ where b and c are constants. I cant seem to get the $dv$ and $dt$ on one side :( If anyone can help me, please explain. Thank you.
Nathaniel Fernandes
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How to calculate the total time a projectile is in the air?

A ball is thrown vertically upward with an initial speed of 9.80 meters per second. What is the maximum height the ball will reach? I need to find the distance (d). But I need the time. How do I calculate the time it will be in the air with a…
Dylan
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