Kinetic Energy
The energy possessed by a body by virtue of its motion is called kinetic energy. In other words, the amount of work done, a moving object can do before coming to rest is equal to its kinetic energy.
`.^..' '` Kinetic energy, `KE =1/2mv^2`
where, `m` is a mass and `v` is the velocity of a body.
The units and dimensions of KE are Joule (in SI) and `[ML^2T^(-2)]`, respectively.
Kinetic energy of a body is always positive. It can never be negative.
A force which is inversely proportional to the speed is acting on a body. The kinetic energy of the body starting from rest is
Options:
(a) a constant
(b) inversely proportional to time
(c) directly proportional to time
(d) directly proportional to square of time