Question

write an expression for the kinetic energy of an object
for class 9th chapter work and energy

Answer 1

HIII.......

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HERE IS YOUR ANSWER:------

EXPRESSION FOR KINETIC ENERGY (K.E)=
1/2MV^2.

IT'S SI UNIT = JOULE (J)


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Answer 2

the kinetic energy of a body can be determined by calculating the amount of work required to set the body into motion with the velocity v from its state of rest.
where
m=mass of the body
u=0=initial velocity of the body
F=force applied on the body
a=acceleration produced in the body in the direction of force
v=final velocity of the body
s=distance covered by the body
so kinetic energy=half m v square