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What objects that do not experience much air or water resistance?
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How can you reduce water resistance on boats?
Water resistance on boats can be reduced by ensuring the boat is as streamlined as possible. This will allow the water to flow past it much more easily, thus reducing resistance.
What is it called when objects displace as much water as they weigh?
buoyancyAn object that displaces its own weight in water is said to be "floating".
Why do objects of different mass fall at the same rate?
objects of different mass fall at the same rate because the acceleration due to gravity is a constant rate. this means that all objects on the earth surface when dropped accelerate at 9.8m/s^2. the only reason this doesn't happen on earth is because of air resistance. take a feather and book for example the feather has more air resistance and floats sideways as well as down compared to the book that doesn't have much air resistance. BUT if you put the feather on the book then dropped it, they would fall at the same time because air resistance is negligible at this point.
How can you predict whether an object will sink or float?
The density of water is 1 g/cm cubed, and objects more dense that water will sink, while objects less dense than water will float. An object will sink if it weighs more than the water it pushes away, and an object will float if it weighs less than the water it pushes away. The Greek mathematician Archimedes discovered that the amount of water displaced by an object depends on the mass of that object. Mass is the amount of matter in a substance, and dense objects have more mass than less dense objects. Dense objects that do not displace much water will sink, while less dense objects that displace a lot of water will float.
Why do you need to know the density of things?
To have knowledge about their property in the real physical world. You can also calculate how much mass an object has if you know how big it is. For example: * Low density objects floats on water. * High density objects sink in water.
How can you reduce water resistance on boats?
Water resistance on boats can be reduced by ensuring the boat is as streamlined as possible. This will allow the water to flow past it much more easily, thus reducing resistance.
If it has higher density does it also mean that it has higher resistance?
No. Resistance and density are unrelated properties; for example, salt water is denser than oil, but has a much lower resistance.
What causes a freely falling object to stop acclerating and continue to fall at its final velocity?
The answer lies in air resistance, which sets a limit, the so-called terminal velocity, on the speed of a falling object. Air resistance creates drag, a real physical phenomenon associated with objects moving through a fluid. You experience drag riding a bike. Imagine how much drag is on a jet airliner! A boat is affected by drag moving through water. Aerodynamics and hydrodynamics address these issues.
Why do some objects float and others do not?
because some objects are much denser(heavier) than water so they sink
What is it called when objects displace as much water as they weigh?
buoyancyAn object that displaces its own weight in water is said to be "floating".
Do objects of the same mass falls at the same rate?
objects of different mass fall at the same rate because the acceleration due to gravity is a constant rate. this means that all objects on the earth surface when dropped accelerate at 9.8m/s^2. the only reason this doesn't happen on earth is because of air resistance. take a feather and book for example the feather has more air resistance and floats sideways as well as down compared to the book that doesn't have much air resistance. BUT if you put the feather on the book then dropped it, they would fall at the same time because air resistance is negligible at this point.
How can you predict whether objects will float or sink?
The density of water is 1 g/cm cubed, and objects more dense that water will sink, while objects less dense than water will float. An object will sink if it weighs more than the water it pushes away, and an object will float if it weighs less than the water it pushes away. The Greek mathematician Archimedes discovered that the amount of water displaced by an object depends on the mass of that object. Mass is the amount of matter in a substance, and dense objects have more mass than less dense objects. Dense objects that do not displace much water will sink, while less dense objects that displace a lot of water will float.
How does the width of a car affect its air resistance?
When an object travels through an atmosphere, it encounters resistance from that atmosphere which is known as drag. objects such as bullets, aircraft and cars are shaped so that they produce less drag as they travel at higher speeds than if they were square or blunt objects. The width of a car does affect the drag it produces, but not nearly as much as the shapes of its leading and trailing edges.
Why do objects of different mass fall at the same rate?
objects of different mass fall at the same rate because the acceleration due to gravity is a constant rate. this means that all objects on the earth surface when dropped accelerate at 9.8m/s^2. the only reason this doesn't happen on earth is because of air resistance. take a feather and book for example the feather has more air resistance and floats sideways as well as down compared to the book that doesn't have much air resistance. BUT if you put the feather on the book then dropped it, they would fall at the same time because air resistance is negligible at this point.
How can you predict whether an object will sink or float?
The density of water is 1 g/cm cubed, and objects more dense that water will sink, while objects less dense than water will float. An object will sink if it weighs more than the water it pushes away, and an object will float if it weighs less than the water it pushes away. The Greek mathematician Archimedes discovered that the amount of water displaced by an object depends on the mass of that object. Mass is the amount of matter in a substance, and dense objects have more mass than less dense objects. Dense objects that do not displace much water will sink, while less dense objects that displace a lot of water will float.
Why is a cap used in swimming?
your hair slows you way down... without a cap people would be much slower.. it all comes down to resistance in the water... you want the leas amound of resistance
What surface best supports a hovercraft and why?
Water or ice are the best surfaces for hovercraft. They're smooth, not much resistance to the drag of the skirt, and not much blow-off.
