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Results tagged with newtonian-mechanics
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user 306389
Newtonian mechanics discusses the movement of classical bodies under the influence of forces by applying Newton’s three laws. For more general concepts, use [classical-mechanics]. For Newton’s description of gravity, use [newtonian-gravity].
2
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If I throw a ball into a quarter of a circular tube, what will be the final direction of the...
The thing that will simplify calculation is the assumption that the cross-sectional diameter of the tube is equal to that of the ball. Because then, at the exit point, the horizontal velocity of the b …
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2
votes
Accepted
Acceleration of the center of mass without external forces paradox
When the cat closes its eyelids, not just the eyelids but its whole body moves in a way that the center of mass does not move.
Imagine a person in space holding some mass in the fist of his stretched …
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0
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1
answer
35
views
Virgin Galactic's and Blue Origin's Space Flights - are these just Extended Skydiving in an ... [closed]
Sorry for four questions in the three paragraphs below, but they all are around the same curiosity that I have.
In both of Virgin Galactic and Blue Origin's space flights happening in July 2021, it se …
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1
vote
How can there be force with no work if $W = Fd$ and $F = ma$?
If there is a net force, there will be a net acceleration.
Acceleration means there is going to be displacement, and now there is a possibility of work.
Possibility because though force dictates curre …
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2
votes
Accepted
Why are dependancies multiplied when a physical quantity is dependant on two different quant...
When we say $F$ is directly proportional to $M_1$, we mean that keeping other things/factors constant, $F$ will change by as much as $M_1$ changes.
This keeping other things/factors constant part is c …
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Object moving from up to down and stopped midair
First imagine moving the ball in horizontal direction using your hand.
In this case, your hand generates and passes kinetic energy to the ball during the motion. And when you stop it, the hand takes b …
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1
vote
Accepted
How does a simple pendulum gain its acceleration?
You explained it almost correctly in your last paragraph. I'm elaborating it to explain exactly what happens when $F$ is removed.
The moment the horizontal $F$ is removed, tension $T$ changes to $T'$ …
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