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If a 20-kg weight is 5 m above the ground and then falls toward the ground how much kinetic energy does the weight have when it is 2 m above the ground?
Wiki User
∙ 6y ago
Calculate the gravitational potential energy between 5 m and 2 m above the ground. If you ignore air resistance, all of that potential energy will be converted to kinetic energy, so that's the answer.
Wiki User
∙ 6y ago
Wiki User
∙ 6y agosince energy is conserved potential energy = kinetic energy. It has fallen 3 meters so used potential energy of mgh = 20 x 9.8 x 3 meters = kinetic energy = 588 Joules
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What energy depends on mass or weight?
kinetic energy
Give one example to show how potential energy can be converted to kinetic energy?
If you have an object on the roof it has potential energy of weight x height above the ground. When you drop it off the roof it is converted to kinetic enemy as it hits the ground, of value 1/2 its mass x velocity squared.
When Bruce lets go of the weight what happens to its energy?
When an object falls down, potential energy is converted to kinetic energy.
Describe a stone falling off a tabletop in terms of both kinetic energy and potential energy?
Sitting on the table the stone has potential energy, relative to the ground, of weight times height, mgh. It has zero kinetic energy so its total energy is E = 0 + mgh. When it begins falling it loses potential energy (as it loses height) and gains kinetic energy ( as it picks up speed) so the sum stays the same as initially E = KE + PE = mgh. Just before it hits the ground all of its potential energy is gone and has been transformed into kinetic energy. So the kinetic energy at the bottom (1/2)mv^2 will equal the potential energy at the top.
Is lifting weight kinetic or potential energy?
potential because it is storing its energy
Describe a stone falling off the tabletop in terms of both kinetic energy and potential energy?
Sitting on the table the stone has potential energy, relative to the ground, of weight times height, mgh. It has zero kinetic energy so its total energy is E = 0 + mgh. When it begins falling it loses potential energy (as it loses height) and gains kinetic energy ( as it picks up speed) so the sum stays the same as initially E = KE + PE = mgh. Just before it hits the ground all of its potential energy is gone and has been transformed into kinetic energy. So the kinetic energy at the bottom (1/2)mv^2 will equal the potential energy at the top.
Are gravitational potential energy and kinetic energy equal in all cases?
They're hardly ever equal. One of the few situations where they're equal is when you drop a weight to the ground from some height. Then, the gravitational potential energy and kinetic energy are equal when it's exactly in the middle of the drop, and the kinetic energy it has when it hits the ground is the same as the gravitational potential energy it had when you let it go.
What energy depends on mass or weight?
kinetic energy
Give one example to show how potential energy can be converted to kinetic energy?
If you have an object on the roof it has potential energy of weight x height above the ground. When you drop it off the roof it is converted to kinetic enemy as it hits the ground, of value 1/2 its mass x velocity squared.
When Bruce lets go of the weight what happens to its energy?
When an object falls down, potential energy is converted to kinetic energy.
What is the relationship between weight and kinetic energy?
Kinetic energy is the energy of motion. The amount of kinetic energy an object has depends on the mass of the object and the speed of the object. The equation is: K= (1/2)mv^2, where K=kinetic energy, m=mass, and v=speed of the object.
How is kinetic energy turned into potential?
One is a weight on an elastic string, bobbing up and down. Each down/up involves potential-kinetic-elastic-kinetic-potential conversions. A transfer would also include placing a heavy weight on a spring-loaded platform. The reduced gravitational potential of the weight is stored as compression energy in the spring, which will rebound if the weight is removed.
Describe a stone falling off a tabletop in terms of both kinetic energy and potential energy?
Sitting on the table the stone has potential energy, relative to the ground, of weight times height, mgh. It has zero kinetic energy so its total energy is E = 0 + mgh. When it begins falling it loses potential energy (as it loses height) and gains kinetic energy ( as it picks up speed) so the sum stays the same as initially E = KE + PE = mgh. Just before it hits the ground all of its potential energy is gone and has been transformed into kinetic energy. So the kinetic energy at the bottom (1/2)mv^2 will equal the potential energy at the top.
Is lifting weight kinetic or potential energy?
potential because it is storing its energy
What type of energy is a car moving?
kinetic energy. The formula for kinetic energy is 1/2 mass (weight) x velocity (speed) squared.
The kinetic energy of an object depends on both its and its .?
weight and mass
Did wind possesses both kinetic and potential energy?
Blowing wind has kinetic energy. This can be transformed into electrical energy using a turbine to transform the wind into rotational kinetic energy and a generator or alternator to convert the rotational kinetic energy to electrical energy. Water above a dam has potential energy from gravity and also from the weight of the water around it. Once it is moving or flowing down through the pipes it then has kinetic energy.
