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Results tagged with newtonian-mechanics
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user 233562
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].
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Confusion about motion and direction of resultant force
When a ball is thrown upwards and there is no air resistance, the resultant force while going up is downwards, so why is the ball moving upwards? Could someone please clear my confusion? Is it because …
- 105
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2
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Confusion about Newton's first law
At the lowest point on a ramp, the skateboarder is travelling at a constant speed along a path which is part of a vertical circle.
How does the weight of the skateboarder compare with the upward force …
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3
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Confusion about Newton's third law [closed]
The question:
A toy rocket consists of a container of water and compressed air.Water is pushed vertically downwards through a nozzle by the compressed air. The rocket moves vertically upwards. The no …
- 105
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1
answer
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Why must the driving force on the car increase to keep the acceleration constant?
The question is: Why must the driving force on the car increase to keep the acceleration constant? If the car is accelerating the driving force is greater than friction and the resultant force is in t …
- 105
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1
answer
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Confusion about effect of atmospheric pressure on depth at which an object floats [duplicate]
The bottom 3.5cm of a plastic block is submerged in water from the lower end of a spring. Why doesn't atmospheric pressure affect the position of the object?
My book says the downward force exerted …
- 105
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3
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Confusion about whether or not force can be exerted on air
If someone is running in air, the air exerts a force on them i.e. air resistance. However, does the person exert a force on the molecules in the air during their motion. It seems very likely to me but …
- 105
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3
answers
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Confusion about direction of friction
A motor is dragging a log up a slope with a cable. When the cable breaks, what happens to the forces? There is no more tension, but does the direction of friction change since the log is now moving do …
- 105
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answer
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Confusion about energy changes
A bicyclist first goes up and then down a hill with constant speed. He ends up at the same height as at the start? I dont understand why to explain the law of conservation of energy my book has stated …
- 105