define kinetic energy and write its mathematical expression for it
Answers
Energy possessed by a body by virtue of its motion is kinetic energy.
Derivation:
Consider a body of mass m initially at rest. If on application of force F, it travels a distance s, then
Work done, W = F x s
By Newton's second law, F = ma
W = ma x s
where, a = acceleration
Using equation of motion v2 - u2 =2as, we get
(v2-u2)/2 = as
W = m x (v2 - u2)/2
As intial velocity is zero, W = ½mv2
This work done is stored as kinetic energy of the object.
So, KE = ½ mv2
Secondary SchoolPhysics13 points
Define kinetic energy, write an expression for kinetic energy. write the s.i. unit o kinetic energy.
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KINETIC ENERGY
It is defined as the energy that a body possesses due to its motion or movement.
SI UNIT
The International Standard Unit of Kinetic Energy is Joules(J).
(J = kg
MATHEMATICAL EXPRESSION FOR KINETIC ENEGRY
Kinetic Energy = 1/2 * m *
where, m is the mass of the object and v is the velocity with which the object is moving.
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