All Questions
Tagged with homework-and-exercises friction
599 questions
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Why is friction between two blocks considered first (not with the ground) when analyzing motion under horizontal force? [duplicate]
Consider a classic mechanics setup:
A small block A of mass m is placed on top of a larger block B of mass M.
The system rests on a horizontal rough surface.
The coefficient of friction between all ...
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(Rolling without slipping) Why is friction acting down the plane? [closed]
I'm quite stumpted on this question, What I've learned is that friction must be opposing the direction of motion so that it can produce a torque which allows the object to roll without slipping. ...
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Paradoxical Behaviour While Dealing with Rolling with Slipping (HW) [closed]
Edit: Ok, I don't understand how this counts as a 'check my work' question given that there is clearly a conceptual error here that I am not getting at. If my purpose was only to find out how to solve ...
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Who exerts force on whom?
When a wheel is spinning, the tires interact with the surface in a way that generates static friction.
Looking at this image, a question came to my mind, are the tires exerting static friction on the ...
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Direction of the friction force exerted on a cart
Here's a picture of my question:
In this picture, the vehicle is accelerating to the right due to the horse's pull, and opposite arrows are used to denote action-reaction pairs described in Newton's ...
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Frictional Torque on a Rotating Triangular Lamina [closed]
I was solving this problem, when i came across the issue i am about to ask here,
A uniform right angled triangular lamina is placed on a horizontal floor, which is not friction less. One of the acute ...
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5
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Is there a principle that determines the tension in this system?
I encountered a doubt while solving this question:
My try. (I have not shown friction force direction but its leftward for all three blocks.)
I have solved this question and have got all correct ...
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What is the minimum torque for a wheel to overcome an obstacle? [closed]
If I have a standard wheel with a motor attached, trying to overcome a vertical obstacle with height less than or equal to its radius, what is the minimum torque required from the motor to do so? ...
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Force calculation exercise [closed]
I'm a student working on a problem, and I'm struggling with part (d), which asks: 'What is the maximum angle?' I know the answer should be 40 degrees, but my solution gives 46.67. I'd really ...
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Why doesn't static friction adjust itself to cancel motion in this 2 block system?
We have to find the acceleration of the blocks.
Let's do the math first and then I will ask my question.
For there to be kinetic friction, the force applied in horizontal ($4 \ \text{N}$) must be ...
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Kinetic energy in circular motion with friction
Suppose a mass $m$ is positioned at the tip center of 1/2-circle with radius $R$ s.t the initial speed and angle both satisfy $v_{i}, \theta_i = 0$ respectively and it falls down to the ground in the ...
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Confusion in kinetic and static friction difference and approaching problems
Is the friction here kinetic since the blocks are moving down. I don't know how to know when to apply kinetic friction and when to apply static fricion. When motion is givien I understand and use ...
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2
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1
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554
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Minimum work done on a mass to take it along a path [closed]
A particle of mass 1 kg is taken along the path ABCDE from A to E (see figure). The two "hills" are of heights 50m and 100m and the horizontal distance AE is 20m while the path length is ...
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Find curve minimizing energy loss due to friction [closed]
I am looking for an ansatz of the following problem:
Given a mass $m$ moving in a constant gravitational field along curves $C$ connecting two fixed points I want to find the curve $C_0$ that ...
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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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