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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How find equilibrant?

If $F_1$ has magnitude 30 N and $F_2$ has magnitude 40 N, what is the exact magnitude and direction of the resultant vector? I have 10 $10 \sqrt37$ and 53 degrees. The next question is What is the equilibrant force that would be needed to…
user366783
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How to solve what appears to be a Suvat question without enough variables?

So I had my FSMQ exam earlier this year. As a part of the curriculum for this exam we had to learn these rules of SUVAT: $$v = u + at$$ $$s = ut + \frac{1}{2}at^2$$ $$v^2 = u^2 + 2as$$ $$s = \left( \frac{u + v}{2}\right) t$$ $$a =…
Gladiator Kittens
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Scientific notation ratio conversion?

I wanted to know if I was thinking about this problem right and set it up correctly. It's been a while since I had to do math like this. The radius of the hydrogen atom is $0.529\times10^{−10}m$ and the radius of the nucleus is…
krizzo
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Natural Frequency and Damping Ratio

I cannot find a simple explanation of the damping ratio formula. The natural frequency for a spring mass system seems pretty simple: position, velocity and acceleration are given by: $$x(t)=Acos(\omega t)$$ $$v=x'(t)=-A\omega sin(\omega…
Pinco Pallino
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uniform rod revolving around a vertical axis with given angular velocity and given length of rod

A uniform rod of given length and given angular velocity is revolving around a vertical axis. Clearly it can do so in a horizontal plane with respect to vertical axis. At what other angle can it do so? That is, what is the angel of inclination…
low iq
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calculation to change a helicopter's vertical position, adjusted with gravity

This is my very first question, so don't be too hard on me :) I am a beginner programmer, and I am working on the typical helicopter game, working with a one-button push: When the button is pushed, the helicopter ascends, starting ascending slowly,…
Antal
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calculate the speed of a ball, with a laser

I'm doing a project where I have to calculate the speed of a ball, passing a certain point. I want to do this with a laser, by taking the time the laser is broken in comparison of the ball it's size. Someone who can help me with the correct formula?
Jonasvr
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Escape velocity

Calculate the escape velocity from a white dwarf and a neutron star. Assume that both the white dwarf and the neutron star is 1 solar mass. Let the white dwarf’s radius be $10^{4}$ kilometres and the neutron star’s radius be 10 kilometres. escape…
user325861
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Find distance as function of time.

A car starts from rest and accelerates in $a = \frac{2\cdot m}{3\cdot s^3}t$, After $3$ seconds, The car will be $27$ metres from beginning. Find distance as function of time. I know i have to integral the acceleration,But i don't know how. I found…
NM2
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How to calculate angle between two objects in orbit

So I have 2 objects in orbit around the same body, and I have all the orbital elements associated with each body. How do I calculate the angle between them both or figure out when they are a certain angle apart using only the all the orbital…
Thedanieldude
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Distance covered by a brick in $1$ second time interval

A brick is dropped from the roof of a tall building.After it has been falling for a few seconds ,it falls $40.0$ meters in a $1.00$-s time interval.What distance will it fall during the next $1.00$ seconds? Ignore air resistance. I've seen…
Mr. Y
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Non-Constant Acceleration

How do we calculate time that we need for specific distance if we have non-constant acceleration. I have some formulas for other variable but don't have for time: Speed at time: $$ v(t) = v_0+at+\frac{j(t^2)}{3} $$ Distance at…
user2704821
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How to subtract two equations?

I am working on a physics problem where I am told that there are two questions: EQ1: $$ W = \left(\frac{\mu_0}{2\pi}\right)\left(\frac{L}{R}\right)I_1^2+I_1LB_{e,z} $$ EQ2: $$ W =…
AAA
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Intensity of sound wave question

The question is: The intensity of sound wave A is 100 times weaker than that of sound wave B. Relative to wave B the sound level of wave A is? The answer is -2db I tried doing (10dB)Log(1/100) but that equals -20dB thanks
Petersicecream
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Historic reference for Eytelwein or Capstan Equation and assumptions

I'm looking for the actual first reference for what is commonly called the Eytelwein or Capstan equation: $$\frac{T_1}{T_2} = e^{ \, \mu\theta}$$ Is there a book/page where Eytelwein published this? I'm also looking for what are the assumptions…
Andrew
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