# 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.

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### b) Compare the velocity of the balls when they hit the ground.

Three balls of equal volumes are dropped from rest simultaneously from a height of 40m. The masses of the balls are 5 kg, 10 kg, and 15 kg.
28 views

### How To Measure Work Done Against Friction On A Non-Linear Path?

I've been trying to solve how to find the Work done against friction as a ball rolls down a curve, but haven't been able to find anything matching what I want online. The solution I have came up with ...
90k views

### How to prove the derivative of position is velocity and of velocity is acceleration?

How has it been proven that the derivative of position is velocity and the derivative of velocity is acceleration? From Google searching, it seems that everyone just states it as fact without any ...
119 views

### geometrical/physical interpretation of multiplication of real numbers (including negative)

In calculus we see that the derivative has a physical interpretation as speed, and a geometric interpretation as slope, and that they are helpful when thinking intuitively about that concept. But this ...
33 views

### Calculate distance from accelerometer .

I'm trying to calculate speed from g-force values from an accelerometer. I get accelerometer readings at 100Hz and want to find the fastest speed over 3 consecutive values (0.03s). I multply ...
1 vote
1k views

### Two particles moving at consant velocity: how close do they get?

A particle was at point $P_1$ at time $t_1$ and is moving at the constant velocity $\vec{v}_1$. Another particle was at $P_2$ at $t_2$ and is moving at the constant velocity $\vec{v}_2$. How close did ...
8 views

### Metric Multidimensional Scaling for Geometric TDoA Array Calibration

Background I'm following this paper, and this Matlab code by the author (see Slide 4), in an attempt to implement metric multidimensional scaling for the calibration of geometric Time-Delay-of-Arrival ...
82 views

1k views

### Linearize Shifted Exponential Decay

I'm just having trouble linearizing a quick function I'm graphing. The function is of a shifted exponential decay from a capacitor : $V(t) = V_0e^{-t/\tau}+V_1$. I previously had the function without ...