The Stack Overflow podcast is back! Listen to an interview with our new CEO.

Questions tagged [forces]

This tag is for the classical concept of forces, i.e. the quantities causing an acceleration of a body. It expands to the strong/electroweak force only insofar as they act comparable to ‘classical’ forces. Use [tag:particle-physics] for decay channels due to forces and [tag:newtonian-mechanics] or one of the other subtopics of [tag:classical-mechanics] for the dynamics of classical systems.

5,322 questions
Filter by
Sorted by
Tagged with
12 views

Total force on a point charge?

I want to calculate the total force acted upon the negative charge in the middle of the circle by the 8 equal positive charges in the periphery. The positive point charge at the bottom is moving with ...
6 views

Designing Circuit whose voltage is controlled by weight [on hold]

I'm really confused on part b of this question. I know what part a's answer is, and I get that -- 2(L-kF)/A But I just don't know where to start with the circuit. How do we know which components to ...
42 views

Is there a reason why forces act a certain way?

I was just wondering if forces in nature just exist as they are or do they have a physical reason for acting the way they do, such as the restoring force and gravity. For example I understand that the ...
18 views

Terminal velocity and distance traveled of a sphere in a liquid

I have actually done this question, but I think it's wrong. The terminal velocity I got was 6000 m/s and a distance traveled of approximately 4000 km. The question is: A sphere with radius R = 5.0 cm ...
97 views

A bead on the wire loop

In my physics book there is a question which stated is as follows: A thin circular loop of radius $R$ rotates about its vertical diameter with an angular frequency $\omega$. Show that a small bead ...
64 views

Can someone explain what is the force the ball will exert?

If a ball is falling under free fall then the force exerted by the ball on the ground would be $mg$. But that's not the case in real life ball would hit with more force. But when i draw free body ...
12 views

horizontal rolling without slipping with constant force acting [on hold]

rolling without slipping ##question an ideal string is wrapped around a cylinder of mass m and radius r, which rotates about a stationary horizontal axis. the free end of string is pulled by constant ...
23 views

How can the acceleration of a person on a zipline be calculated?

I was thinking one day about how a speed, or perhaps the acceleration, of a person riding a zip line could be calculated. I first started by thinking of an ellipse where the two foci were the anchors ...
56 views

Finding two masses as one rotates about an axis, no givens

My Physics C class was given a lab today with little explanation, and many of us are having issues determining a solution. We are given this apparatus: We must find the masses of both objects m and ...
18 views

A particle is observed from two frames $S_1$ and $S_2$

The frame $S_2$ moves with respect to $S_1$ with an acceleration a. The $F_1$ and $F_2$ be the pseudo force on the particle when seen from $S_1$ and $S_2$ respectively. My problem is, can such a ...
96 views

Why is contact resistance proportional to $\frac{1}{\sqrt{F}}$ not $\frac{1}{F}$?

See pages 13-15 in "Electrical Contacts: Principles and Applications" for reference. Imagine the following system: Two flat, but rough, surfaces of the same finite area $A$ being brought together. ...
3k views