Question

define kinetic energy ​

Answer 1

Answer:

✍ The Kinetic theory was developed by Maxwell, Boltzmann and others in the 19th century.

✍ It explains the behaviour of gases based on the idea the gases consists of a large number of atoms or molecules in a state of continuous random motion.

✍ The inter atomic forces binding the atoms are negligible. The theory is consistent with various gas laws and Avogadro's hypothesis.

✍ It gives molecular interpretation of temperature, pressure, specific heat capacities, viscosity, conduction and diffusion of gases.

Answer 2

$\bold{Kinetic \:Energy\: :}$

Kinetic energy of an object is an energy that is possessed due to its motion.

• Example : Rotation of planet around sun or A planet rotating around the earth.

• Unit : Joule (J) or kg m²/s²

• Derivation :

Consider an object (O) on which force (F) is acting which moves the object through distance (s).

Now..

W (work done) = F × s

We know that

F = ma

So,

W = (ma) s ______ (eq 1)

After workdone the object changes it's velocity from u to v. Acceleration (a) also acts on it.

v² - u² = 2as

(v² - u²)2a = s

s = (v² - u²)/2a

Put value of s in (eq 1)

W = ma [(v² - u²)/2a]

W = 1/2 (v² - u²) × m

W = 1/2 (mv² - mu²)

Now.. object is at rest. So, u = 0

W = 1/2 mv²

K.E. = 1/2 mv²

_____________________________