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WHAT IS THE RELATION BETWEEN a.work and energy b.joule and kilojoule?

Energy is the capacity to do work. For example, if you consider the energy as currency, then you would have to spend some energy to do some work.

Kilo means 1000, so kilojoule means 1000 joules.

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a. The work-energy theorem states that the work done on a body is equal to the change in kinetic energy of the body.

Suppose a body of mass m is under an acceleration a due to which its initial speed u at time t = 0 becomes final velocity v at time t = t.

The distance travelled by the body in this time can be found out using,

v 2 = u 2 + 2as

Multiplying both side by ½ m we have,

½ mv 2 = ½ mu 2 + mas

(ma)s = ½ mv 2 ½ mu 2

Work done = change in kinetic energy of the body.

b. 1 kJ = 1000J

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a. The work-energy theorem states that the work done on a body is equal to the change in kinetic energy of the body.

Suppose a body of mass m is under an acceleration a due to which its initial speed u at time t = 0 becomes final velocity v at time t = t.

The distance travelled by the body in this time can be found out using,

v 2 = u 2 + 2as

Multiplying both side by1/2 m we have,

1/2mv 2 =1/2 mu 2 + mas

(ma)s =1/2 mv 2 1/2 mu 2

Work done = change in kinetic energy of the body.

b. 1 kJ = 1000J

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