what is kinetic energy?

Answer 1

It the energy a moving body has due to its motion.
As you know...
for example:
E=.5mV^2
E - kinetic energy
m - mass of the object
V - speed with which it is moving.

Answer 2

1. [a] relating to the motion of material bodies and the forces associated therewith; "kinetic energy". [See source.]

In classic physics (based in large part on Newton's laws), energy based on mass at rest or in motion is summed up as TE = KE + PE; where TE = total energy, KE = kinetic energy, and PE = potential energy.

There are other kinds of energy that can be, and usually are, included in TE. For instance, heat energy (Q) might be included as it results from friction. In which case we would have TE = KE + PE + Q.

TE = constant; so KE, Q, and PE have to trade off. Thus when KE goes up, the heat and/or PE of that associated mass (m) must go down, and vice versa. This is called the conservation of energy law. That is, energy can be neither created nor destroyed, it can only be converted (KE to PE and vice versa).

Closely associated with the energy of moving bodies, we also have the work function W = Fd; where work has the same units as energy, F = the force moving a mass a distance d. This form of energy requires a mass actually moving some distance. Note that this is neither kinetic nor potential energy. It is in fact a converted form of KE after the mass was moved using KE. That is, KE became work done (W); so we can write KE = W.

Answer 3

Good Question! Kinetic energy is energy caused by motion of an object. It is the work/energy needed to accelerate a body from rest to its current velocity.
It gains this energy fro acceleration and when the body maintains this, kinetic energy remains unless its speed changes.

Hope this helps.


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Answer 4

Kinetic energy is the energy by virtue of the motion of an object. It is defined as the work needed to accelerate a body from rest to its current velocity. Having gained this energy during its acceleration, the body maintains this kinetic energy unless its speed changes. Negative work of the same magnitude would be required to return the body to a state of rest from that velocity.

Answer 5

Kinetic energy is the amount of energy an object has while moving. Potential energy is the amount of energy the object has at rest before it goes into motion.

Answer 6

kenetic energy stored during motion.
like the teacups at the fair as they spinn they build up kenetic energy. at the end of the ride it normaly takes a min. or so to disipate this energy.to find the K.E. of an object moveing in a strait line use this formula
.5 * the mass * the square of the velocity

for a spinning object like the example use
.5* distance to the center * the square of the angular speed (in rads.)
hope it helps.

Answer 7

kinetic engery is energy in motion. pretty much anything moving has kinetic energy.

Answer 8

Kinetic energy is the force that contains an object which can be moved....

Answer 9

Energy acquired on accout of motion
generally represented by
[1/2]*m*v^2
m=mass of the body
v=velocity

Answer 10

It is the energy possessed by any body by virtue of its motion

K.E = 1/2mv^2