All Questions
26
questions
1
vote
1
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54
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Why the orientation of an object on Earth rotates with the rotation of earth? Is this due to friction?
The moon always faces toward Earth. That's because the moon rotates itself while revolving around the earth. This might be the result of tidal force for a long time, but what about objects on Earth? ...
- 25
0
votes
0
answers
53
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Maxwell's wheel - moment of inertia vs damping coeff
I am investigating the relationship between the moment of inertia of a yoyo-like apparatus (maxwell's wheel) and its damping coeff. I am adding disks to my yoyo to change its moment of inertia, which ...
- 1
-1
votes
5
answers
134
views
Newton: an object in motion remains in motion: was there anyone else who believed this? [closed]
From my own experience as a schoolkid, that was the law that I was not buying. I could see his understanding of the Lunar orbit making him think this but otherwise, what in human experience would lead ...
- 2,238
1
vote
3
answers
202
views
Can we have motion in systems where inertia is neglected? [closed]
According to Newton's law:
$$ \sum F=ma$$
So, if we have some acceleration, it's because we have a certain amount of motion in our systems.
This makes me confused if inertia was neglected. Are there ...
- 231
5
votes
5
answers
819
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Could you determine if you were moving when standing on an infinite, frictionless plane?
I'm quite curious to know about this question. I don't really fully understand how inertia works so I couldn't quite put this one together in my head.
As far as I know, if you are moving in empty ...
- 51
1
vote
4
answers
476
views
Conceptual difficulty with friction and inertia
Consider this -
A box lies on the floor of a bus which starts accelerating. Two cases arise
$1.$ If the static friction is great enough, the box accelerates with the bus with acceleration equal to ...
- 428
1
vote
4
answers
491
views
How does Inertial force arise?
Consider the following scenario$-$
A ball sits on the floor of a bus, which was originally at rest w.r.t the ground. Suddenly it accelerates forward, and we observe the ball moving backwards. Well, ...
- 428
0
votes
2
answers
36
views
Is there a way to find out how long a body will glide after a force is applied once? [closed]
Can you tell how long a body will retain it's motion after being given a push from x amount of force (ex. 15 force applied, motion will last 18 seconds)?
- 75
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votes
2
answers
67
views
When a car is coming to a stop is there any resistance offered by it to stay in motion?
Suppose a car is in a state of uniform motion moving at a high velocity and then begins slowing down due to force exerted by the brakes on the car. Will the car offer any resistance due to its inertia ...
- 356
3
votes
1
answer
197
views
Why lighter bottles stay on better rather than heavy bottles?
I was watching a Mythbusters video of them doing the table cloth trick and Adam says that the lighter bottle worked better. Don't heavy bottles (more mass) have more inertia and therefore should work ...
- 329
0
votes
3
answers
2k
views
Should the coin be heavier or lighter in the coin drop experiment?
The Coin Drop experiment is a classic experiment used to demonstrate Newton's First Law of Motion. In this experiment, a glass is covered with a card and a coin is place on the card. The card is given ...
- 5,306
0
votes
1
answer
37
views
Calculate stroke force and angle for a ball rolling on a surface to reach a destination position (optimal golf putt)
I'm trying to find an algorithm which calculates the optimal golf putt (angle, force) given a 3D surface (obtained through Poisson reconstruction), start and destination position (hole). I guess that ...
- 101
-1
votes
2
answers
797
views
What causes a particular object to have a tendency to go outwards in circular motion when the centripetal force is inwards to the center [duplicate]
Like a circular bead with a thread passing through it and the system being rotated . It can't be centrifugal force as it is pseudo only and has no existence when we are already in an inertial frame ...
- 133
2
votes
5
answers
1k
views
Would you be able to get off of a frictionless surface?
Imagine that you are standing (naked) in the center of a level circular disk (with a radius of, say, 3 meters) that is completely frictionless.
Without resorting to blowing air or excreting any ...
- 121
0
votes
2
answers
200
views
Is this the correct way to think about why static friction is directed radially during a turn on a level surface?
So after much pondering of the fact that the net static friction force points in the center, perpendicular the tangential motion, I thought of this explanation.
If we look at a car travelling around ...
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