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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what is the total time to leave the lake?

While sleeping, you were transported to the surface of a frozen lake. When you wake up, you are 34.3m from the nearest shore. The ice is so slippery (without friction) that you cannot walk. You realize that you can use Newton's third law to your…
Jojo
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Proving Simple Harmonic Motion

A particle is attached to an extensible string (the tension in string, $T = \frac{\lambda x}{l}$) and the particle is pulled so that the string is extended and released from rest. As in this diagram: SHM is proved by $a = -w^2x$ both the…
Jonathan.
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How do I find the distance an object travels while decelerating?

I feel like this should be fairly obvious but I can't find any example questions in my textbook (which is usually how I figure out how to do stuff) A 1000 kg car experiences a net force of 9500 N while decelerating from 30 m/s to 23.4 m/s. How far…
Psychonaut
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Motion with acceleration and deceleration

Stumbled on this while working on a program code to display motion animation. The scenario is, the program will have a function to move a picture from its current position to move right. The program took only 2 variables, which is the travel…
AzDesign
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Does the work required to lift an object depend on the acceleration of the object?

I'm confused by an example in Stewart's (8th edition, early transcendentals) Calculus textbook. Example 1, Section 6.4: "How much work is done in lifting a 1.2kg book off the floor to put it on a desk that is 0.7m high?" I can understand the…
CJD
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Force between two wires

Eight points, A,B,C,D and A',B',C',D' are arranged in space as the vertices of a cube of side a, with the faces ABCD and A'B'C'D' opposite, and A nearest to A' etc. Currents I and I' flow in current carrying wires around the sides of these two…
Tom
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Gravitational Potential Energy MDOF system

I'm trying to find the Equation of motion for a MDOF system using the energy method. Using Lagrange's equation, I can get almost everything except for the potential energy of the bar. Using newton's method, and assuming small angle, $\sin(\theta)$ =…
Pete
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question on drawing v-t, x-t and a-t graphs

can anyone draw pictures of the x-t, v-t, and a-t graphs.. i think i know how to do it but I want to make sure. For example for the first question, my x-t graph will just have positive slope starting from origin, my vt graph will have a slope of 0…
user130306
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2D asteroid problem

I don't know how to solve the next problem, and if anyone could explain to me step by step how it is solved I would thank you a lot. I know it's not hard, but I'm not seeing how to do it. Thank you in advance! An asteroid passes next to a planet…
Pol Vega
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Why does the light at the bottom of a mug trace a cardiod?

Everytime I go to grab a mug I see a shape in the bottom, which looks oddly like the cardioid. Is there some mathematical/physics answer to this phenomenon?
feverdreme
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How to find Time when you know the Distance and Acceleration

The Distance is 0.1693 meters and the Acceleration is 10 m/s^2. What equation would I use to find time this certain question.
Edward Payan
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Specific unit conversion

This could as easily be a physics or chemistry question, so I would like to avoid this conversation in the comments. I would like to know the general method of converting between units. For example converting Joules to $\frac{g\cdot cm^2}{s^2}$ I…
bobsburger
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Solve for time in constant velocity question (easy)

A speeder drives by a cop car moving 50m/s. The cop takes 12 seconds to get things in order and then chases after the speeder, traveling 60 m/s. How much time will it take the cop to catch up to the speeder? This is what I have so far: $v_c= 60$…
user130306
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Question on constant velocity (easy)

Two animals are charging at each other. They stand 20 m apart. The smaller animal charges at 6.5 m/s. The larger animal was measured to run 24 m in 3 s. At what position will the two sheep collide? So far I have this: $v_L = 8 m/s$, $v_s=-6.5…
user130306
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Mathematics- mechanics

Show that an object accelerating with acceleration a from velocity $u$ to velocity $v$, where $0
Shah21
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