Question

Define kinetic energy, write an expression for kinetic energy. write the s.i. unit o kinetic energy.

Answer 1

HERE'S YOUR ANSWER


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 $m^{2} s^{2}$

MATHEMATICAL EXPRESSION FOR KINETIC ENEGRY

Kinetic Energy = 1/2 * m * $v^{2}$

where, m is the mass of the object and v is the velocity with which the object is moving.


HOPE HELPED!!

Answer 2

Answer :

kinetic Energy

The energy of a body due to its motion is called Kinetic energy. The kinetic energy of a moving body is measured by the amount of work it can do before coming to rest . Mass of body is doubled ,its kinetic energy also gets doubled and if the mass of a body is halved, its kinetic energy also gets halved. kinetic energy of a body is directly proportional to the square of its velocity . If the velocity of a body is doubled the kinetic energy becomes four times and if the velocity of a body is halved then its kinetic energy becomes one - fourth . The kinetic energy of a body depends upon its mass and velocity . Therefore heavy body moving with high velocities have both kinetic energy than slowing moving bodies of small mass. this is the reason why a blacksmith uses heavier hammer than the one used by a goldsmith .

Kinetic Energy =

$\frac{1}{2} \times m \times {v}^{2}$

From this mathematical formula, It is clear that :

• The kinetic energy of a body is directly proportional to the mass of the body.
• The kinetic energy of a body is directly proportional to the square of velocity of the body or square of the speed of the body.

SI unit for kinetic energy is Joules.