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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A man whirls bola

The bola is a traditional weapon used for tripping up or grounding an animal (Fig). Once it is set into motion, each ball at the end of the bola can be thought of as a single object in uniform circular motion. Suppose it takes the bola 0.3250 s to…
Kizaru
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Calculate the Required RPM of a cylinder where the diameter is constantly growing given a material feed rate of 100 Ft per minute.

I need a formula for finding out what RPM I need to rotate a spool of material in order to keep up with a given feed rate supplying that spool. So imagine a Roll of Paper Towels .. In a linear fashion I am feeding the spool at a rate of 10 Feet Per…
StixO
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Equivalent resistance between points K and M

The equivalent resistance between K and L is given $3\Omega$. How do I evaluate the equivalent resistance between K and M? I couldn't think of anything so far. Could I get your dear assistance? Regards
Mark
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finding angular acceleration given the angular velocity and the radius of the circle

Problem: A woman is running at 8m/s in a circular motion, the radius of the circle is 100m. What is her acceleration in m/s/s? I don't have a clue how to start! I wanted to use this: \begin{align}\omega^2 - \omega_0^2 =…
jdoe123
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Using wrong physics formulas

We were given a couple formulas, but the one that immediately stood out to me was the Vfinal = Vinitial + at so we know the patrol will constantly accelerate "until he pulls next to the speeding car" so Vfinal = 30m/s and Vinitial = 0(cop at rest)…
Pookie
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Minimal force F to keep the block from moving if....

The question is: Determine the minimal F necessary to keep the block from moving if the coefficient of friction is $\mu=.3$. I know the horizontal force to the left is $cos (70)(50)=17.1 lbs$ My calculation for the friction force is…
user163862
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Displacement at any given moment given total displacement, time and velocity

I want to compute the displacement of an object at a certain moment in time, given the values for: Initial velocity vStart (m/s) Target velocity vEnd (m/s) Total distance traveled sTotal (meters) Total duration tTotal (seconds) At any given time…
M4rw
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Find max velocity given initial velocity, final velocity, acceleration and time

I am trying to find the maximum velocity in a trapezoidal-like motion profile given the initial velocity, the final velocity, the acceleration, the total time and distance traveled. If the initial and final velocities were zero, I would simply use…
bme83
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Convert this figure to watts , where W = 1 J/s , and then estimate the average per capita energy consumption rate in watts.

The world consumes energy at the rate of about $466 EJ$ per year, where the joule$(J)$ is the SI energy unit. Convert this figure to watts$(W)$ , where $W= 1 J/s$, and then estimate the average per capita energy consumption rate in watts. I'm…
Diana Martinez
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Nautical Miles Per hour to knots

I have a question, A ship covers 52 nautical miles in 4h 20min. What is its speed in knots? [1knot = 1 nautical mile per hour] with the clue given (1 knot = 1 nautical mile per hour) in the question, I could see that 52 nautical miles are directly…
Geetha
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Simple explanation to the RHR?

Can someone please explain the Right Hand Rule (used in Physics for magnetism), in basic calculus? As we have simply been given a 'vague general rule to use', and no other vector-calculus has actually been taught to us, I have trouble understanding…
Nuclear
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Vectors and velocity

A plane heads at an angle of 30 degrees west of north at a speed of 250m/s. Calculate the westward and northward components of the planes velocity
Nayeli Montemayor
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What does the slope of a rotational Displacement Graph indicate?

If you have a graph of the displacement vs time of an object in angular/rotational motion, what would the slope of the graph indicate conceptually?
user3776749
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Solving problem concerning simple machines

An object with the weight of $80N$ is balanced with the force of $\vec {F}$ as seen on the diagram. What is the value of $\vec {F}$? (Ignore the weight of pulley and friction) Resolving the components in $y$-axis. The $y$-axis component of $F$ is…
Busi
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Finding the lenght of the arc KL

The beam is sent to the plane mirror which is put on the center of this circular plane and reflected from the point $K$. When the plane mirror is rotated $10°$ in the direction of arrow, the beam is being reflected from the point $L$. Determine the…
Busi
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