All Questions
Tagged with momentum newtonian-mechanics
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Idealized Newton's cradle
I was wondering about the conditions for an ideal newtons cradle.
Under regular circumstances, the collisions are inelastic and a newton's cradle dissipates energy in various forms like heat, friction,...
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Why is it less shocking to cross the bump with just one wheel? [closed]
Difference between 'go over speed bump with one side' and 'both sides at the same time'
I asked a similar question previously and received an excellent answer stating that when going ...
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Direction of impulse
My textbook has the following problem:
A batsman deflects a ball by an angle of 45° without changing the initial speed which is equal to 54 km/h. What is the impulse imparted to the ball? (Mass of ...
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How does the direction of the change in momentum of the object change during the motion?
In the case of an object's movement resembled in this graph, as the gradient is decreasing, a decrease in velocity occurs.
According to the formula
$$p = mv$$,
The momentum is directly proportional to ...
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Could we deduce energy, momentum and angular momentum conservation laws from only Galilean relativity?
In Newtonian physics we could deduce conservation of energy, momentum and angular momentum from Newton's three laws.
But by Noether's theorem, conservation laws could be deduced from symmetries.
Could ...
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Do bodies stick together after an inelastic oblique collision?
My question is particularly about an oblique collision case. (For example a body having velocity along x axis approaching another with velocity along y axis) From what I know, in perfectly inelastic ...
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After how many bounces will a ball's mechanical energy equal zero?
This was a question I asked myself for fun. It turned out to be more difficult than I initially imagined.
The Problem: Let's say a ball is dropped from h0. Air friction is negligible. The collisions ...
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Where did the rotational energy come from? [duplicate]
Consider a floating static pencil in flat space with no gravity. If we apply an impact force F for a short time t to the pencil vertically, pencil must get a CM momentum Ft, and corresponding kinetic ...
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Confusion in conservation of momentum [closed]
Two masses $m_1$ and $m_2$ are attached to the two ends of a rope that is sent through a pulley. Then a mass $M$ is dropped onto the mass $m_1$ from a $h$ height. So when the law of conservation of ...
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Catching a large reaction mass in space [closed]
Suppose we have a long, cylindrical spaceship in free fall in space. Another spacecraft is nearby for observing the cylindrical craft; also in free fall so we can determine when the cylindrical ...
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Can you make a car powered by 4 car air jacks? Using the mechanics of a manual pedal pottery wheel
If an air jack can pump up a car using little force, can’t an aluminum air jack spin a plastic wheel barrel car going at least 10 mph?
Each wheel will have an air jack that uses the mechanics of a ...
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Conservation of momentum in Newton's cradle
Imagine a Newton's cradle with 5 balls with mass of each ball is $m$. In a case where two balls are dropped against three balls, if we write an equation considering that momentum is conserved,
$$ 2mu=...
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Conservation of $y$ component of momentum
Rain with mass $mr$, falling vertically downwards at speed $v$, into a truck of mass $mt$, moving on a horizontal surface at speed $u$ inital, ignoring friction and air resistance. Taking the system ...
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How to interpret the additive term in torque formula?
Torque formula for a body subjected to a force is: $\vec{M}$ = $\frac{\mathbb d\vec{L}}{\mathbb dt}$ + $\vec{v}_o$ $\times$ $\vec{p}$; where $\vec{M}$ is the torque, $\vec{L}$ is the angular momentum, ...
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Pure rolling interrupted, does friction provide impulse?
When a ring is under pure rolling (no slipping and friction zero) on a horizontal rough surface and now another small ball hits it, can there be impulse due to friction? I feel that there should be ...
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