Question

Define one (1) joule of work done [1]
Q2. Derive : K.E = ½ mv2 [1]
Q3. State the law of Conservation of Energy. [1]
Q4. Define power, with its S.I unit [2]
Q5. Convert 1kWh into Joule​

Answer 1

Answer:

Ans 1 - 1 Joule is amount of work done when a force of 1 Newton displaces a body through a distance of 1m in the direction of the force applied.

Ans 2 - In image

Ans 3 - The law of conservation of energy states that energy can neither be created nor be destroyed. Although, it may be transformed from one form to another. If you take all forms of energy into account, the total energy of an isolated system always remains constant.

Ans 4- Power is defined as the rate of doing work. It is the ratio of the work done(W)and the time taken(t).

The SI unit of power is Watt(W), in the honor of physicist James Watt.

Ans 5-

1 kWH= 1 kilowatt × 1 hr

= 1000 watt × 3600 s

= 3.6 × 10⁶ J

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