# Mechanical Energy and Its Types - Kinetic Energy

### Formula for Kinetic Energy:

Work done →  W = F x s     ...(i)

due to force, the velocity changes to 'v', and the acceleration produced is 'a'

therefore relationship between v, u, a and s= v2 - u2 =2as

therefore "s" = ("v"^2 - "u"^2)/"2a"     ...(ii)

F = ma     ...(iii)

substitute (ii) and (iii) in (i) we get

W = F x s

= "ma" xx ("v"^2 - "u"^2)/"2a"

"W" = 1/2 "m"("v"^2 - "u"^2)

if    u = 0, (object starts at rest)

therefore   "W" = 1/2"mv"^2

Work done = Change in kinetic energy

therefore    "E"_"k" = 1/2"mv"^2

#### description

• Kinetic Energy
• Factors affecting the kinetic energy of a moving body
• Expression for the Kinetic Energy
• Relationship between kinetic energy and momentum
If you would like to contribute notes or other learning material, please submit them using the button below.

### Shaalaa.com

Kinetic Energy [00:12:39]
S
0%