Mathematics Stack Exchange
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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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A wagons speed at a certain point of a roller coaster.

So as an exercise I'm trying solve the speed (m/s) of a wagon on a roller coaster. The wagon is moving at 12m/s at a specific moment and I'm trying to find out the speed of the wagon at 27 meters below the initial position. The correct answer is 26…
Talar
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How to see if x kbps of information can be transmitted with shannons theorem

I found this question on the web: 'We are given a medium that will reliably transmit frequencies between 0 and 25,000Hz. Is it possible to transmit 200Kbps of information along this line?' What I am wondering is if we can check this with Shannons…
ili
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How is delta v from earth to venus calculated?

Trying to do hohmann transfers from earth to venus and getting a a total delta v of around 6km/s. Every source online seems to be saying 3.5km/s. Can someone show how the delta v to get to venus and the capture manoeuvre are calculated?
j1nkso
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Find Distance given two speeds and total time

i have a problem with a question we have been given at school. I have to find the distance (d) a bow-shooter is from the target, given the speed of the arrow (v1) and the speed of sound (v2), and the total time it took for the shooter to hear the…
Thoughtfox1
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How can the oscillation of a dish be represented with an equation?

I am reading the book Surely You're Joking, Mr. Feynman! and I got to the point where he is eating lunch in the canteen when someone throws a dish and he thinks about the equation which represents its oscillation. I got curious about it. What is the…
Chiara Cecconi
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Where this $2\pi$ came from?

In this link there are this equation (12.3.2): $B = \frac{\mu_0}{4\pi}\int_{wire}\frac{I\sin{\theta}dx}{r^2}$. And is said to substitute $r$ by $\sqrt{x^2+R^2}$ and $\sin{\theta}$ by $\frac{R}{\sqrt{x^2+R^2}}$. This part is easy. $B =…
ガブリエル Gabriel
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Please first use equation (3) and solve $̇()$ of roly-poly toy model

Question:Please first use equation (3) and solve $̇()$ By definition: let $a$ =second derivative of $\theta$ $b$ =first derivative of theta Here, $ℎ$ is the $y$-coordinate of $$ and we take these parameters: $ℎ= (3/8), _ =(83/320)^2, =…
john chong
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Finding acceleration of an elevator

A person that weighs 560 N stands on a scale in an elevator supported by a cable. The combined mass of the person and the elevator is 870 kg, and as the elevator starts moving the scale reads their weight as 450 N. I want to find the acceleration of…
Lex_i
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Range of object in circular motion

An object is launched from a semicircular chute 1.4 meters from the ground at a constant speed. The radial acceleration is 7.9 m/s^2 and radius is 0.7 m. Find the horizontal range the object travels from the bottom of the chute to the moment it hits…
Lex_i
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Figure out rate of change of speed for fixed distance

Say I have two points. I know the distance between those points. And let's say I have a bobbin that's starting at point A at a fixed speed of 100 jiggers/second By point B, I want my bobbin to only be traveling 20 jiggers/second. What equation can I…
dclowd9901
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The speed of light in a vacuum is $ 2.998 \times 10^8$ m/sec. What is this speed in miles per hour?

Peace to all. Studying and trying to get a handle on how to calculate like-minded questions, I came across this question from the web. I don't understand how exactly it was solved. How were the units canceled out and with what…
יהודה
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Simulating linear motion of object

I would like to calculate the distance travelled of an object. I have a start position(mm), an acceleration (mm/s^2), a speed (mm/s) and then a deceleration (mm/s^2). Note the deceleration value can differ from the acceleration. There is also a…
SimonW
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Direction of acceleration in Simple Harmonic Motion.

A particle of mass = 0.5kg, is attached to a spring of natural length = 0.6m and modulus of elasticity = 60N,and the setup is on a horizontal smooth table. The other end of the string is attached to a fixed point, A, on the table. The particle is…
Jonathan.
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How to represent average speed problem as rational equation?

A driver went $200$ km. For the first $100$ km of the trip, the driver traveled at a speed of $40$ km/h. For the second half of the trip, the driver traveled at a speed of $60$ km/h. What was the driver’s average speed for the entire trip? I used…
X X
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What's the speed along x Axis?

Three forces acting on a body are given by F1 = (- 2.15i + 2.92j) N, F2 = (4.80i-2.83j) N and F3 = (- 46.6i) N. The object is initially at rest and accelerates by 3.01m / s^2. After 11.4 s, what is your speed along the x axis (the component of the x…
Jojo
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