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Why the Archimedes' principle is not valid in case of an elevator accelerating upwards but it is valid for a car accelerating on a level road?
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Why is ship floating on the water but it is made of metal?
Because the volume of water it displaces weighs more than the ship. Archimedes principle says that the upwards force on the ship is equal to the weight (mass) of fluid displaced - so the ship floats
Can people control gravity?
We can do various things that affect gravity over the relatively short term, like going into orbit, accelerating upwards, or accelerating downwards. We cannot, however, arbitrarily create gravity where there is none or eliminate it where it is.
Achimedes ' principle?
Archimedes principle states that any immersed body in a fluid will experience a buoyant force which is equal to the weight of fluid displaced by it and always acts upwards through the centroid of displaced volume. Note that if the object weight less than the wieght of water it displaces, it will float. If it is heavier than the weight of water it displaces, it will sink but its apparent weight in water will be its in-air weight minus the weight of the water it displaces.
How do you draw an elevator free body diagram?
Draw an arrow pointing upwards for the tension force and an arrow pointing downwards for the weight of the elevator which will be its mass times gravity (mg). Also, draw another arrow pointing downwards for any mass that may be inside the elevator (another mass times gravity arrow but for a separate weight) and add that value to that of the weight of the elevator. Depending on the direction that the elevator is moving (up or down) draw another arrow respectively and label it "a" for acceleration.
How does Archimedes' principle relate to convection?
Fine question. In a nut shell, Archimedes' principle tells us how things float (buoyancy). Things float when they are lighter than the amount of water (I say water....could be any non-solid medium, it tells us why helium balloons fly away and etc) they displace. This means they have less density (mass per unit volume). In convection, cool parts sink and gain heat energy. They then expand due to the heat, rise away from the heat source and cool off. Archimedes' principle explains why this occurs because as things increase in temperature - they expand. Expanding means you have more volume for the same mass (thus less mass per unit volume and so less density). So we can see why the hot material moves upwards and the cool material moves downwards (as it is more dense than the hot material). This forms a continual cycle that we know as convection. If this is at all confusing, try googling 'convection' and just find some clear animations (there should be a fair few) of the cycle. You'll have it in no time.
What two contributions to mathematics and physics did Archimedes make?
Archimedes contributed to physics by discovering Archimedes' Principle, the law that an object submerged in a fluid is acted upwards upon by a force equal to the displaced weight. In mathematics, he provided the proof that an area of a portion of a parabola is 4/3 the area of a corresponding triangle.
What forces act on an object in a lift accelerating upwards?
=== ===
Formula of Archimedes?
Archimedes Principle states that when an object is put in water, or some other fluid, the buoyant force exerted on it is equal to the weight of the fluid that the object displaces. This means that if an object is partially submerged in water, its apparent weight will lessen because of the force exerted upwards on it by the water.
When taking an elevator to the top floor which direction are you traveling?
upwards
Why is ship floating on the water but it is made of metal?
Because the volume of water it displaces weighs more than the ship. Archimedes principle says that the upwards force on the ship is equal to the weight (mass) of fluid displaced - so the ship floats
What is a line sloping upwards on a speed time graph tell us?
The object is accelerating
Why did Archimedes built the Archimedes screw?
When it was first invented, it was intended to draw water out of Greek ships. However, it was later used for irrigation.
What are the two forces acting on a person as they move up and down in an elevator and when are these two forces equal and when are they not equal?
When the elevator is still the force of gravity due to your weight pressing downwards on the floor is equalled exactly by the floor pushing you upwards with the same force. When the elevator rises you feel a little heavier, and the elevator is pushing upwards with the same increased force. When the elevator descends you feel that you lose a little weight, and the floor pushes up at you with the equally reduced force, so you descend.
What does a line that is sloping upwards on a speed time graph shows us?
That the object being studied is accelerating in the radial direction.
Can people control gravity?
We can do various things that affect gravity over the relatively short term, like going into orbit, accelerating upwards, or accelerating downwards. We cannot, however, arbitrarily create gravity where there is none or eliminate it where it is.
What is achimedes principle?
Archimedes principle states that any immersed body in a fluid will experience a buoyant force which is equal to the weight of fluid displaced by it and always acts upwards through the centroid of displaced volume. Note that if the object weight less than the wieght of water it displaces, it will float. If it is heavier than the weight of water it displaces, it will sink but its apparent weight in water will be its in-air weight minus the weight of the water it displaces.
Achimedes ' principle?
Archimedes principle states that any immersed body in a fluid will experience a buoyant force which is equal to the weight of fluid displaced by it and always acts upwards through the centroid of displaced volume. Note that if the object weight less than the wieght of water it displaces, it will float. If it is heavier than the weight of water it displaces, it will sink but its apparent weight in water will be its in-air weight minus the weight of the water it displaces.
