18
votes
Accepted
What IS the precise angle of repose of Cadbury Creme Eggs, anyways?
Packaging engineer here who legitimately needed the answer to this question. The answer is roughly 25 degrees. Note the angle of repose is defined from the ground plane, opposite to your diagram.
I ...
- 346
5
votes
Accepted
Query in Newton's Third Law and friction
You gave a reasonably accurate description of static friction, but then you said it was kinetic friction. In kinetic friction, the magnitude of the force is constant and in the direction opposing the ...
5
votes
Query in Newton's Third Law and friction
The force pushing the box and the force of friction are not a third law pair, there is no reason why they must always be equal and opposite. They may happen to be equal and opposite, as in the case of ...
- 7,809
4
votes
Query in Newton's Third Law and friction
In addition, that friction and applied force is not a third Newton law force pair (because they acts on the same body),- friction responds to normal force, which usually is perpendicular to external ...
- 9,158
4
votes
Query in Newton's Third Law and friction
Newton's third doesn't say that these two forces should be on the same object. If you have two objects, $A$ and $B$, one of the two forces could on $A$ and the other on on $B$. The law can also be ...
4
votes
How does the Coriolis effect explain Ekman transport?
In this answer I will first generally address the properties of the rotation-of-Earth-effect that is taken into account in Geophysical Fluid Dynamics. (Geophysical Fluid Dynamics is the umbrella name ...
- 18.1k
3
votes
Query in Newton's Third Law and friction
You need to distinguish between kinetic friction and static friction. It is static friction the prevents the object from moving at all. Static friction is a variable force that matches the applied ...
- 63.1k
2
votes
Damped harmonic motion
If the mass doesn't move too quickly, the resistive force acting on it will be due to the air's viscosity, and will be proportional to the body's velocity and in the opposite direction to it. As you ...
- 31.6k
1
vote
How does the Coriolis effect explain Ekman transport?
I'm using a second answer to adress some misunderstandings.
You write:
" [...] pressure increases with water depth, meaning more wind energy is required to move 'heavier' water."
Actually, ...
- 18.1k
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