ASWI U
2. Define 1 joule of work.
Explain giving one example.
4. State the law of conservation of energy.
5. Define : Watt, Joule. What is the relation between
6. Show that a person walking along a horizontal roa
not doing any work.
7. Explain why time is important when measurin
while measuring the energy of the body.
Define the term 'Energy'. Name the different for
1. Explain the terms: Work, Power and Energy.
3. Is it possible that a force is acting on a body but
Answers
1) Joule is the SI unit of work. 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.The mass per unit length of water in the pipe is 100 kg/m.
2) In physics and chemistry, the law of conservation of energy states that the total energy of an isolated system remains constant; it is said to be conserved over time.For instance, chemical energy is converted to kinetic energy when a stick of dynamite explodes.
3) The watt (symbol: W) is a unit of power. In the International System of Units (SI) it is defined as a derived unit of 1 joule per second, and is used to quantify the rate of energy transfer. In SI base units, the watt is described as kg⋅m²⋅s‐³. The watt is named after James Watt, an 18th-century Scottish inventor.
4) Transferring energy can be in the form of force. This amount of energy transferred by the force to move an object is called work or work done. Thus, the relation between Work and Energy is direct. That is, the difference in the Kinetic energy of an object is work done by an object.
5) WORK = W=Fd. Because energy is the capacity to do work , we measure energy and work in the same units (N*m or joules). POWER (P) is the rate of energy generation (or absorption) over time:P = E/t. Power's SI unit of measurement is the Watt, representing the generation or absorption of energy at the rate of 1 Joule/sec.
6) Yes, it is possible that a force is acting on a body and still the work done is zero. When a man is pushing a wall, work done is zero as there is no displacement.
Answer:
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