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Results tagged with forces
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user 68181
This tag is for the classical concept of forces, i.e. the quantities causing an acceleration of a body. It expands to the strong/electroweak force only insofar as they act comparable to ‘classical’ forces. Use the [particle-physics] tag for decay channels due to forces and [newtonian-mechanics] or one of the other subtopics of [classical-mechanics] for the dynamics of classical systems.
2
votes
Accepted
Adding an additional fan to a fan powered sail according to Newton's 3rd Law?
You will have twice the air pressure force acting on the sail, but also two fans that are pushing backward on the boat, so the forces will still balance. …
- 4,064
5
votes
What role does static friction force play for a rolling object? How can I know what directio...
If the wheel is rolling at constant velocity without any other forces acting, then there is no tendency for slippage between the wheel and the surface, so there is no friction. …
- 4,064
10
votes
Why is the equation for friction so simple?
It's so simple because it just happens to be a very simple, idealistic model for explaining how friction acts. In reality, friction is significantly more complicated - for instance you have static/dy …
- 4,064
2
votes
Can you ever exert more downwards force than your weight?
Sure, I can think of a couple of ways you can exert more downwards force than your weight:
Brace against something above you with your hands, e.g. a low ceiling. Then, push against that with your h …
- 4,064
1
vote
Discrepancy in general work and pressure-volume work
However, during a collision, it is probably more useful to think in terms of a momentum transfer, rather than a balance of forces - Newton's Second Law can be written as 'force equals rate of change of …
- 4,064
2
votes
Accepted
When pressure is exerted on parallel hydraulic pistons, do they start extending at the same ...
Initially, I agreed with Olaf Chujko's answer to this question; however, on further reflection, I think the most accurate answer is 'it depends':
Firstly, from the schematic that is given, when switc …
- 4,064
0
votes
Woodworking clamps, does force add up?
He's right - the forces of the clamps will add up. You seem to be confusing force and pressure. …
- 4,064