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Problems

For posting attempts at solutions to physics problems.

60%
+1 −0
Find a trajectory such that the action is a minimum

A particle is subjected to the potential V (x) = −F x, where F is a constant. The particle travels from x = 0 to x = a in a time interval t0 . Assume the motion of the particle can be expressed i...

1 answer  ·  posted 1y ago by deleted user  ·  edited 1y ago by Trilarion‭

66%
+2 −0
Slipping and rotation

A disk of mass $M$ and radius $R$ is initially rotating at angular velocity of $\omega$. While rotating, it is placed on a horizontal surface whose coefficient of friction is $\mu=0.5$. How long ...

1 answer  ·  posted 2y ago by deleted user  ·  edited 1y ago by deleted user

60%
+1 −0
Find equation of motion using. Lagrangian given equation is $L'=\frac{m}{2}(a\dot{x}^2+2b\dot{x}{y}+c\dot{y}^2)-\frac{k}{2}(ax^2+2bxy+cy^2)$

$$L'=\frac{m}{2}(a\dot{x}^2+2b\dot{x}{y}+c\dot{y}^2)-\frac{k}{2}(ax^2+2bxy+cy^2)$$where a, b, and c are arbitrary constants but subject to the condition that $b^2 − ac \ne 0$. What are the equat...

1 answer  ·  posted 1y ago by deleted user  ·  last activity 1y ago by celtschk‭

71%
+3 −0
Find initial velocity when a stuntman jump from $1.25 \ m$ height

A stuntman jumped from $1.25 \ \text{m}$ height and, landed at distance $10 \ \text{m}$. Find velocity when he jumped. (Take $\text{g}=10 \ ms^{-2}$) I had solved it following way. $$h=\fra...

1 answer  ·  posted 1y ago by deleted user  ·  last activity 1y ago by deleted user

50%
+0 −0
Why used $\cos\theta$ for $\text{y}$ axis or, gravitational force?

Mass M1 is held on a plane with inclination angle θ, and mass M2 hangs over the side. The two masses are connected by a massless string which runs over a massless pulley (see Fig. 3.1). The c...

1 answer  ·  posted 1y ago by deleted user  ·  last activity 1y ago by deleted user

50%
+0 −0
Why answer matched but, unit?

Mass of a timber is $20 \ g$. And, density of that timber is $0.27 \ g/cc$. That timber was bind to a metallic materials and, it was released to $0.970 \ g/cc$ water. How much the wood was submer...

1 answer  ·  posted 1y ago by deleted user  ·  last activity 1y ago by deleted user

60%
+1 −0
Delta to Wye conversion

I have a circuit like this. And, I want to calculate resistance from here. I was following these steps. I was calculating resistance for left side circuit. $$R_1=\frac{2 × 2}{2+2+4}=0.5\Omega$$...

1 answer  ·  posted 2y ago by deleted user  ·  last activity 2y ago by Olin Lathrop‭

50%
+0 −0
Calculating frequency of oscillation

A 4C point charge of mass 2kg is suspended by a string of length 6m. The charge is placed in the Earth's Gravitational field and a uniform horizontal electric field of strength $\sqrt{11}NC^{-2}$...

1 answer  ·  posted 2y ago by deleted user

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