Prof. Antonio Schowalter
Feb 08, 2025
does Pe = Ke?
The question "Does Pe equal Ke?" is quite brief and lacks context. To enhance clarity and provide a more engaging inquiry, I suggest the following revision:
"In the context of physics, can we equate potential energy (Pe) to kinetic energy (Ke) in specific scenarios, or are there fundamental differences that prevent such equivalence? I would appreciate insights on the principles governing these two forms of energy and any equations that illustrate the relationship between them."
6 Answers
yeah…the equation can be set as:
PEi + KEi = PEf + KEf
where i stands for initial and f stands for final.
this is the same as the change in PE equals the opposite of the change in KE.
of course, though, that equation only works if you don’t include other energies such as friction or sound. if you roll a ball down a frictionless ramp into a loop, you should be able to find it’s speed at any place on the ramp or loop using that equation. but if it there’s friction, it causes it to slow down and the calculations will be inaccurate.
It depends on the situation. In simple mechanics – say dropping an apple from a tree, then the gravitational potential energy is equal to the kinetic energy when it hits the ground. And at some point near the middle the Pe and Ke are equal.
Dec 03, 2024
I think what you mean is
∆Pe = -∆Ke
Or, the change in Pe equals the change in Ke. (The negative sign implies that a change for a loss in one is a change for an increase in the other.)
In simple mechanics and Brownian motion, objects have stored or potential energy or kinetic energy. Potential energy can be transferred into kinetic energy and vice versa, but since the total amount of energy remains unchanged, any change in one must equal the opposite change in the other.
Feb 07, 2025
https://shorturl.im/hZTRe
PE is mgh m- mass g-gravity h-height KE is 0.5mV^2 m- mass v- velocity
Related Questions
"If this same quantity of energy were transferred to 2.5 kg of water at its boiling point, what fraction of the water wo...
Have you ever noticed how the rear wheel of a bike seems to follow the front wheel closely? Why does this happen, and is...
Please identify each of the following as measurements: Length Area Volume Mass Density Time Temperature...
A rescue pilot needs to drop a survival kit while flying at an altitude of 2,000.0 meters with a forward velocity of 100...
Today's CPUs operate at speeds measured in gigahertz rather than kilohertz. Is this statement true or false?
I have a question regarding torque in a magnetism context. I understand that the equation τ = IABsin(θ) will be relevant...
A 4.5 kg box slides down a 4.4 m high frictionless hill, starting from rest. It then travels across a 2.4 m wide horizon...
How does friction play a role in sledding and skiing? Specifically, what are the effects of friction on speed, control,...
What is the speed of light in kilometers per hour?
A radio telescope features a parabolic surface, as illustrated below. Given that the telescope is 1 meter deep and 12 me...