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Escape Velocity Question: Why is the final kinetic energy = 0? Final kinetic energy approaches zero as the object moves infinitely far from the planet, indicating that it will not return, while gravitational potential energy also approaches zero at infinity The escape velocity represents the threshold where an object's initial kinetic energy is sufficient to ensure it remains unbound from the planet
Why is kinetic energy 1 2 mv^2? - Physics Forums This is probably a stupid question because the answer is likely "it just is" I am reading Calculus: The elements by Michael Comenetz, and when talking about mQ, he goes on to say "there happens to be advantage in working with 1 2 mQ rather than mQ itself", and then gives the equation k = 1 2
How is momentum conserved if you lose kinetic energy? The energy component of KE is the velocity Momentum is mass x velocity so, in a collision containing in-elasticity, if KE is lost to heat then that heat energy must have been supplied by the velocity of the object And since velocity has been lost to supply the heat then the overall momentum
Double KE, what happens to velocity - Physics Forums Doubling the kinetic energy (KE) results in an increase in speed by a factor of √2 The equation K = 1 2 mv² shows that if speed is doubled, the kinetic energy increases fourfold Conversely, if the kinetic energy is quadrupled, the speed will double This relationship highlights the direct connection between kinetic energy and speed, assuming mass remains constant Understanding these
Rotational Kinetic Energy of Big Ben - Physics Forums The problem I am working on is: "Big Ben, the Parliament tower clock in London, has an hour hand 2 70 m long with a mass of 300 kg, and a minute hand 4 20 m long with a mass of 100 kg (see figure below) Calculate the total rotational kinetic energy of the two hands about the axis of rotation
Kinetic energy of a rotating disc - Physics Forums if KE=1 2mv^2 and you have a circular object rotating, with it's mass uniformly distributed through the object (ie each part of the disc weighs the same) then obviously certain parts of the disc will be moving faster than others therefore closer to the middle of the disc, you have more KE
Calculating Kinetic Energy in English Units - Physics Forums Homework Statement An object has a mass of 10 lbm b Find the change in kinetic energy ft·lbf when its velocity decreases from 50 mph to 15 mph Homework Equations KE=1 2mv^2 Ke=(ft*lbf) 1MPH=1 4667 ft s The Attempt at a Solution When calculating this, does it need to be in slugs, lbm, or
Calculating Kinetic Energy for an Object at an Angle I have a question regarding how to calculate kinetic energy Let's say I was to find the kinetic energy of a ball shot at 180 m s at a 45 degree angle Do i simply sub in 180 as v (velocity) in the kinetic energy equation (1 2mv^2) or must it be split into components?