jbriggs444's latest activity

A line can't be perpendicular to a point. You probably meant to ask: "Aren't gravitational field lines always straight and directed...

The element that was returned to the top never left the system. The impulse that brought it to momentary rest was an external force...

Kingsong 18XL is rated at 2200 W and 104 Nm. One finds online that rated power and peak power differ by roughly a factor of two. One...

As a legume and a non-grass, rotation of fields into alfalfa can be helpful for fertility and for anti-pest purposes. Also, pet rabbits...

Is momentum conserved here? We have the external forces from the two pulleys and the external force from gravity. Do those always sum to...

First, think about the equilibrium position. Can you draw that? Clearly the centre mass will keep descending as long as it is above...

I do not know.

In a head on impact, yes. But not all impacts are head on.

It might help to treat the mouth in more detail. Say it is a smooth quadrant of radius ##r##. We are interested in the limit as...

Let us reverse engineer that equation. It would have been nice to have you provide the justification for your own equations. You are...

"Wrong Way Peach Fuzz" at your service.

But what if one of the carriers is running in reverse? Then two right sides are available.

Surely the new random velocity is not obtained directly from the Maxwell distribution. The distribution of resulting velocities should...

I just tossed a pen in the air, giving it an end over end spin. The laws of physics did not prevent it.

dx/dt is not positive by definition. It can be either positive or negative. If ##x## is a differentiable and strictly monotone...