Potential energy decreases while kinetic energy increases as a car goes down a hill without braking.
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.
As the potential energy of a falling (or rolling) object turns into kinetic energy, part of that energy is almost immediately dissipated by friction - converting it mainly into heat.
The potential energy will double too.
588,000 J
The coaster have a large amount of potential energy when it gain height, kinetic energy when it gain speed instead.
the speed will make the kinetic energy smaller.
This question makes sense in the context of something like a pendulum. At the top of its swing, a pendulum is at maximum height, is not moving and so has zero kinetic energy, and has maximum potential energy since all its energy is potential. As it falls, it gradually moves with increasing speed, so its potential energy is being converted to kinetic energy. At the bottom of the swing, it is moving at maximum speed, and all its energy is kinetic, none is potential, Then it starts to move upwards again, and its kinetic energy is gradually converted back to potential energy.
So the potential energy is the energy in the car at the top of the first slope. It changes into kinetic energy (Speed with mass) as it rolls down the hill. Then the electric motor winds it back up the hill, putting potential energy in the system again.
Clearly, that depends on the amount of potential energy. If given the height, calculate the potential energy with the formula for gravitational potential energy (PE = mgh). If mass is not given, you can assume any mass (it doesn't affect the result), or use a variable "m". Then, assuming it gets converted to kinetic energy, use the formula for kinetic energy (KE = (1/2)mv2), replace the KE with the energy you calculated before, and solve for v (the speed).
Potential energy is unrelated to speed.
Potential energy is not affected by speed.
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.
-It increases
Does speed 'effect' the gravitational potential energy of an object? No, but gravitational potential energy can be converted into kinetic energy - so the gravitational potential energy can effect the speed. Ep = mgh Energy Potential = mass * 9.81 (gravity) * height Speed / Velocity is absent from that equation.
Increasing the speed will increase the KINETIC energy, not the potential energy. Of course, the potential energy may eventually be converted into kinetic energy, for example if the object moves upwards.
It can be a little complicated but I'll do my best to explain.Quick Vocab: potential energy - the stored energy in an object because of its position, shape, or condition. Kinetic energy - the energy of an object due to its motion. The more potential energy an object has the more Kinetic energy it will have. Basically when the object is moved the potential energy is released and becomes kinetic energy. As the kinetic energy (speed) increases the Potential energy decreases.So yes, when the potential energy decreases the speed increases.
When the rock is high up but has not been dropped yet, it has a lot of gravitational potential energy because of its position. PE = (mass) x (G) x (height) After it is dropped, the lower it goes, the less potential energy it has. That bit of missing potential energy has become the kinetic energy that it now has on account of its speed of descent. KE = 1/2 (mass) x (speed)2
potential and kinetic energy
-- If the velocity is horizontal, then gravitational potential energy doesn't change. -- If velocity is vertical and upward, gravitational potential energy increases at a rate proportional to the speed. -- If velocity is vertical and downward, gravitational potential energy decreases at a rate proportional to speed.
As an object falls from a higher level to a lower level, the gravitational potential energy that it had at the higher level changes to kinetic energy. As more and more potential energy changes to more and more kinetic energy, the increase of kinetic energy shows up in the form of greater speed.
Yes, if it is rolling at a constant speed it has potential energy.