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What happens to the potential energy that an object loses if it is lowered so slowly to the floor that it gains almost no kinetic energy?
OK. You're holding a brick, and you're lowering it very slowly and gently to the floor.
Because of gravitational forces acting on the brick, it wants to accelerate downward
at 9.8 m/s-sq, but you're not letting it fall.
In order to do that, you have to exert an upward force on the brick, and you have to
maintain that upward force on it as it settles all the way down. You're exerting a force
that points up, through a distance that points down. Your muscles do negative work,
meaning that they absorb mechanical energy. That's the potential energy that the brick
gives up on its way down.
(You almost had me there. It's a great question, and I had to think about it. That was
an uncomfortable feeling.)
What else can I help you with?
What happens to potential energy if speed doubles?
An object's potential energy doesn't depend on its speed. You can do anything you like with the object's speed, and it has no effect on potential energy.
If a stone is pushed from the top of the hill what kind of energy would it have halfway down the hill?
The stone would have a combination of potential and kinetic energy halfway down the hill. The potential energy would decrease as the stone moves lower, while the kinetic energy would increase as the stone gains speed.
True or false does potential energy depends on height is gravitational potential energy?
It is true that an object has more potential energy as it is raised higher. ?As the object falls from a height, the force of gravity will convert the potential energy into kinetic energy. ?The further it falls, the more kinetic energy will be gained. ?Conversely, the higher an object is raised, the more potential energy it has.This follows the equation? work = force x distance that force movesTherefore, the higher an object is, the greater the distance that the force of gravity will move as it accelerates the object while it falls. ?As it approaches the ground, it will have lost all potential energy but it will have kinetic energy of the same amount.Important note: ?The discussion about all potential energy being converted to kinetic energy above ignores air resistance. ?In the real world, air applies a frictional force on a body and will have the effect of slowing the object. ?Therefore, some of the potential energy will actually be turned to heat rather than ?kinetic energy. ?Most school physics questions will also ignore resistance due to air and therefore the description above works perfectly well for almost every question that will be seen.
What is the kinetic energy of an object weighing 65 kg dropped from a height of 40m?
Kinetic energy is dependent on which point you are talking about. When it is about to be dropped, kinetic energy is zero. When it reaches almost hits the ground, there is maximum kinetic energy.
Why steam causes more severe burns than boiling water. give reason.?
So, steam must lose its heat of vaporization. Think about how it would lose it. Where would all that energy go? It condenses by inputting all the potential energy it has by being a gas into the skin of the person who touches it. Therefore even though steam only has slightly more kinetic energy than almost boiling water, it has a lot more total energy.
What happens to the potential energy an object loses if it is lowered so slowly that it gains almost no kinetic energy?
If the object is lowered slowly and gains little kinetic energy, the potential energy is mostly converted into other forms of energy, such as heat or sound, due to friction and air resistance. Therefore, the potential energy is dissipated as heat or other forms of energy rather than increasing the object's kinetic energy.
What happens to potential energy if speed doubles?
An object's potential energy doesn't depend on its speed. You can do anything you like with the object's speed, and it has no effect on potential energy.
Can an object have both mechanical and kinetic energy?
Yes, an object can have both mechanical energy and kinetic energy. Mechanical energy is the sum of an object's potential energy and kinetic energy. Kinetic energy is the energy an object possesses due to its motion, whereas potential energy is the energy stored in an object due to its position or state.
Does water have energy?
Yes, water has energy in the form of kinetic energy and potential energy. Kinetic energy refers to the energy from water molecules moving, while potential energy refers to the energy stored when water is held at a certain height.
Where is the maximum and minimum kinetic and potential energy found as a ball drops?
A ball at rest contains only potential energy. A ball in motion contains almost all kinetic energy. But it gets tricky here. A free falling ball that has not yet reached terminal velocity has no potential energy. That energy is being given up to kinetic energy. Once the ball reaches terminal velocity in Earth's atmosphere, air resistance holds back further conversion of potential energy to kinetic.
What is an example of kinetic energy changing into electrical energy?
an example to that is that kinetic energy changes with the help of work while electrical energy is by power like outlets etc. (almost related to potential energy think of it like that.)
What sort of energy does a book have if it falls off a high shelf?
Before it falls it has gravitational potential energy. While it falls, the potential energy gets converted to kinetic energy. Part of this gets dissipated by friction - mainly converted to heat. Once it hits the ground, all the energy will be converted to heat.
If a stone is pushed from the top of the hill what kind of energy would it have halfway down the hill?
The stone would have a combination of potential and kinetic energy halfway down the hill. The potential energy would decrease as the stone moves lower, while the kinetic energy would increase as the stone gains speed.
What energy conversions occur in a pole vaulter?
When the pole vaulter just passes over the bar, he/she is almost stationary, and certainly at the maximum height reached above the ground, so apart from a very small amount of kinetic energy as a result of passing over the bar, all the energy put into the vault is bound up in gravitational potential energy. During the approach, the jumper runs up so has acquired kinetic energy. Then during the vault he/she exerts force on the pole to gain height, and to convert the horizontal kinetic energy into a vertical direction. This force comes from the chemistry of the muscles of the body. So the overall conversion is from kinetic energy plus muscular chemical energy into gravitational potential energy, which is then converted back to kinetic energy on the descent.
Is light potential energy?
Light is a form of energy, but it is not considered a form of potential energy. Light energy is a type of electromagnetic radiation that can travel through space and is typically associated with photons moving at the speed of light.
What energy can Kinetic energy be converted to?
Kinetic energy can be coverted to electrical energy. This happens in power stations when turbines turn (kinetic) to generate electricity. There are other applications that transfer kinetic energy to electrical energy such as dynamos. Sometimes the kinetic energy is converted to stored energy like strain or gravitational energy. Winding something up for example, this energy can then be used to power watches, wind up toys and even wind up radios. Kinetic energy is also converted into heat and sound - rub your hands together and you'll see what I mean!
What is a sentence for drawbridge?
The drawbridge is being lowered now, Sire.I almost fell off of the drawbridge.
