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 the [particle-physics] tag for decay channels due to forces and [newtonian-mechanics] or one of the other subtopics of [classical-mechanics] for the dynamics of classical systems.
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Problem explanation from Estonian-Finish Physics 2003 olympiad [closed]
I am having trouble understanding problem 5.3 (Vibrations) from the Estonian-Finish 2003 Physics olympiad. Specifically in 5.3 they say "brick is kept in motion along(horizontal) $y$-axis by a ...
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Tug of war between observers in frames with different rate of time
You have a very dense hollow sphere of matter. Observer A is inside the sphere inside a rocket. Observer B is in an identical rocket outside the sphere where the ring's gravity is negligible. They are ...
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Implicit definition of internal forces through choice of dynamical description of a rigid two mass pendulum
The central mass theorem states that the center of mass of a N-body system moves as if all external forces acting on the bodies of the system acted directly on the center of mass, it is a generic ...
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Statics problem from classical mechanics
I was solving David Morin's book on classical mechanics.
In the solution for the second part of the "a" part of the question, why is the normal force defined as $Ndθ$ and not just $N$? Is ...
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Force and torque on the plate in a flow, described by complex function [closed]
I'm not sure if i should start with Blasius theorem to directly calculate the F_x and F_y, or to first calculate the velocity near the plate and then the pressure with Bernoulli's equation.
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Why do objects slow down when they hit the ground? [closed]
Say you drop an object on the ground. For the purpose of this question, I am just focusing on the slowing down of the object, not if it rebounds. I was just wondering which of the two reasons explains ...
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Why does an accelerometer read geavity when at rest? [duplicate]
This may sound like a stupid question but why does an accelerometer read 9.8 (gravity) on the vertical axis when I set it down on a table?
I have just finished AP Physics Mechanics and was under the ...
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Calculating vehicle and tire acceleration with tire slipping
I'm attempting to simulate the motion of a vehicle with $N$ tires and I'm running into some trouble deriving forces/acceleration when adding friction and tire slipping into the picture. Here's an ...
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Final velocity when accelerating down a rotating corridor [closed]
Lets say you have a wheel of radius 100m. The wheel has a corridor at its center, such that the top of the corridor is at the center of the wheel, while the bottom of the corridor is at the edge of ...
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Forces accelerating a tire
I'm attempting to write a little vehicle simulator and I'm working on calculating vehicle linear acceleration and tire angular acceleration. I'm trying to add in tire slipping and I'm having trouble ...
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Strange calculus involved in work and power [closed]
If force is given by $$F(t)= 3t^2i + t^3j$$ and velocity is $$v(t)= 5t^2i + 2tj$$ then what is work done in time $t$. Now we can obtain power by their dot product $F.v$ and then integrate power to get ...
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Determining Tension in a Massless String Under Various Configurations: Straight, Over a Pulley, and Around a Fixed Nail
If a massless string is stretched by applying extensive forces of magnitude
𝑥 on both sides, a tension
𝑇 is developed at every point of the string. If the same massless string is placed over a ...
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Can there be a reaction force to a reaction force? [closed]
I am considering the example of bouncing a ball on the ground. When the ball hits the ground, that is the action force, correct? Then, the ground exerts an upward reaction force on the ball, which ...
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How does a vehicle's brake affect the friction between the vehicle and ground?
When brakes are activated in a vehicle it decelerates. Analysing its motion, there can be only one force that can be responsible for it: the friction between the car and the ground.
So does braking ...
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How significant is the parabolic arch effected with an incline versus a decline in angle versus a decline in angle . For example throwing a dart
A dart players height can vary as can the height in which they raise their arm to aim.
Is there less parabolic arch when throwing at the same strength from above the target compared to below, due to ...
