Kinetic energy - Wikipedia
be in many forms! Here we look at Potential Energy (PE) and Kinetic Energy ( KE). energy gets converted into kinetic energy (and heat) as they speed up. When an object falls through the atmosphere at terminal speed: its kinetic energy, KE, does not increase; gravitational potential energy, GPE is transferred to the Notice that m appears on both sides of the equation and can be cancelled out. The following equation is used to represent the kinetic energy (KE) of an object. That means that for a twofold increase in speed, the kinetic energy will increase Like work and potential energy, the standard metric unit of measurement for.
BBC - GCSE Bitesize: GPE and KE - Higher tier
Without loss or gain, however, the sum of the kinetic and potential energy remains constant. Kinetic energy can be passed from one object to another.
In the game of billiardsthe player imposes kinetic energy on the cue ball by striking it with the cue stick. If the cue ball collides with another ball, it slows down dramatically, and the ball it hit accelerates its speed as the kinetic energy is passed on to it. Collisions in billiards are effectively elastic collisionsin which kinetic energy is preserved. In inelastic collisionskinetic energy is dissipated in various forms of energy, such as heat, sound, binding energy breaking bound structures.
Flywheels have been developed as a method of energy storage.
This illustrates that kinetic energy is also stored in rotational motion. Several mathematical descriptions of kinetic energy exist that describe it in the appropriate physical situation.
However, if the speed of the object is comparable to the speed of light, relativistic effects become significant and the relativistic formula is used. If the object is on the atomic or sub-atomic scalequantum mechanical effects are significant, and a quantum mechanical model must be employed. Newtonian kinetic energy Kinetic energy of rigid bodies In classical mechanicsthe kinetic energy of a point object an object so small that its mass can be assumed to exist at one pointor a non-rotating rigid body depends on the mass of the body as well as its speed.
For example, the gravitational potential energy of the ski jumper is equal to the work done by a chairlift or by her legs in getting her to the top of the ski jump.
Investigating gravitational PE You can use the bouncing ball in Fig. Bearing in mind that energy is always conserved, where is the ball when its kinetic energy is greatest? When the KE is zero, the PE will be at its greatest. Pull up the graph from the bottom of the simulation window. Observe the maximum KE of the ball. Can you work out what the maximum PE of the ball will be? Watch to see what height the ball bounces up to.
Drop the ball from here. What materials you used in the experiment. A detailed description of how the lab was set up and how you tested your hypothesis. A summary of your data and the answers to your data analysis questions.
Any observations you made with your group. A conclusion that answers the Conclusion Questions below. Conclusion Question -Look back at your hypothesis from the beginning of the lab.
Was your hypothesis was valid or invalid? Why or why not?
- Potential and Kinetic Energy
- GPE and KE - Higher tier
- Kinetic energy
Did you see evidence of this relationship in data collected? Think about a large bus and a small car traveling at the same velocity. Which vehicle can do more damage in a crash?
Rub your hands together slowly for 10 seconds and then place your palms on your face.