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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Energy equation vs. Binet's equation

A comet, traveling with speed $V$, is at a very great distance from a star. If the path of the comet were unaffected by the presence of the star it's closest distance of approach would be $d$. However, the comet experiences an attractive force…
gov
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How do I calculate a graph of my power output from this data set?

I have the following data set from cycling (recorded with GPS): unixtime|humantime|lat|lon|ele 1375422506|2013-08-02 07:48:26|49.084247|19.308619|536.9 1375422515|2013-08-02 07:48:35|49.084076|19.308629|534.0 1375422520|2013-08-02…
Frantisek
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How to calculate distance covered by the beam? (friction force problem)

Question: A uniform beam of weight W and length L is initially in position AB. As the cable is pulled over the pulley C, the beam first slides on the floor and is then raised, with its end A still sliding. If $\mu$ be the coefficient of friction…
Ankita Pal
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Pendulum with moving pivot

I'm making a game which you can see here, if you are on Windows or Linux: http://insertnamehere.org/birdsofprey/ If you click and hold your mouse on a bird, you can see I'm just swinging the bird back and forth in pendulum motion. I would like to,…
Ricket
  • 1,171
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Physics formula proof for height of a building

I am having difficulty proving this physics formula. It states: If a physics student drops a watermelon from the roof of a building and hears the watermelon going "splat" on the ground after time $\Delta t$, show that the height of the building $h$…
Anson Pang
  • 589
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Practical Math - Hanging a 48" high mirror at the proper height

How high must a 48-inch high mirror be hung if one who is six feet tall needs to see his entire image from approximately 6 feet away from the mirror?
Ann
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How to solve math word problems?

I don't understand how people can know how to solve math word problems. I went to high school in the worst state in the USA for education. My math classes didn't have word problems at all, so I can't understand them now. Something like this: "A…
user416503
  • 137
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Equation of motion for a wobbling disc

While looking at a frisbee the other day, I suddenly had a question. Suppose (in free space) you set a disc-shaped object spinning, and then you impart a sudden force perpendicular to the spinning surface near the edge. This undoubtedly causes the…
rschwieb
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Calculating kinetic energy

I have the question: "Calculate the kinetic energy, $E_k$, when a car of mass $1500$ kg travels at a speed of $108$ km/h." I converted the $108$ km/h to $108000$ m/h by multiplying by $1000$. I then divided $108000$ by $60$ to get minutes and…
Dan
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Asymmetrical Center of Gravity Problems

Calculating center of gravity asymmetrical objects find the position of the center of gravity of relative to the edges AB and AC…
david m
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Calculating Calories burned from mass and acceleration

I know force is equal to mass times acceleration. What I'm trying to do is find a formula that will calculate how many calories are burned using mass, acceleration and time. For example, if I have a two pound object in my hand and I am shaking the…
Alan Bryan
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finding the mass and number of atoms

A small cube of iron is observed under a microscope. The edge of the cube is $4.00 \times 10^{-6}$ cm long. The atomic mass of iron is 55.9 u, and its density is 7.86 $g/cm^{3}$. a) Find the mass of the cube. b) Find the number of iron atoms in…
user45417
  • 309
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If Roger is fired from the cannon with an angle of inclination θ of 60° and that he hits...

If Roger is fired from the cannon with an angle of inclination θ of 60° and that he hits the ground 1/2 mile from the cannon. What, then, was Roger's initial speed?
user136446
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Almost done with rolling without slipping problem (physics)

I'm almost done with a problem on rotational mechanics. I've got a golf ball rolling down a hill and I'm to find the value of the angle of the hill so that the ball can roll without slipping if the constant of friction $\mu = 0.29$. Now I've got $$…
Paze
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Calculate maximum velocity given accel, decel, initial v, final position

I'm trying to calculate the maximum velocity of an object given: acceleration deceleration starting position (0) ending position initial velocity I've been trying to use formulas…
Derek Lewis
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