# Questions tagged [newtonian-mechanics]

Newtonian mechanics covers the discussion of the movement of classical bodies under the influence of forces by making use of Newton’s three laws. For more general discussion of energy, momentum conservation etc., use classical-mechanics, for Newton’s description of gravity, use newtonian-gravity.

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### Tension by a string on a pulley

I was doing this problem, and I had trouble drawing the free body diagram of the pulley. (The pulley is massless, frictionless.) I had trouble understanding how both the ends of the string will apply ...
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### Ball rotating in a circle without rope/string - why doesn't the ball fall after the peak?

I am currently learning about the problem of a ball rotating in a vertical circle - where we are interested in determining the minimal height $h$ required in order for a ball sliding from rest down a ...
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### Why don’t we feel weightless on airplanes?

I was just sitting when suddenly I thought of something. If we feel weightless because there is no contact force acting on our bodies. Then why are there no contact forces for people in the ...
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### An asteroid hits the Earth

An asteroid floating in space (about zero speed, not near any planet or star) has about zero gravitational potential energy. If that asteroid drifts near the earth, our gravity gives it some potential ...
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### What is the relationship between amplitude and max velocity?

What is the relationship between amplitude and velocity? I read through my textbook and online, but I'm still unsure. For example, would an increase in amplitude be proportional to max velocity. If ...
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### “Inverse” $(N+M)$-body problem
This question is a logical continuation of the question about "Inverse" $N$-body problem. Let's consider the following extension of that problem: Assume that there are $(N+M)$ particles in ...