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KUMAR PRAKASHAN-WORK AND ENERGY -QUESTION & ANSWER (ANSWER THE FOLLOWING QUESTIONS IN VERY SHORT)
- Define work
01:16
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- What is the unit of work?
01:11
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- Is work a scalar or a vector quantity?
01:28
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- Why is the work done against gravity considered negative?
01:47
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- State two conditions needed for work to be done.
01:34
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- When is the work done by a force zero?
02:20
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- A porter is standing with a suitcase over his head. What is the work d...
01:26
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- What is energy?
01:14
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- What is the unit of energy?
01:10
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- What is mechanical energy?
01:14
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- What is potential energy?
01:26
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- If the work done on an object is 10 J and the object is displaced thro...
01:13
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- Name the type of energy possessed by a stretched rubber band.
01:35
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- A car and a truck are moving with the same speed of 12ms^(-1). If thei...
01:37
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- What is the commerical unit of energy?
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- Find the velocity of a body of mass 100 g having kinetic energy 20 J.
01:31
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- State the law of conservation of energy.
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- Define work
01:16
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- What is the unit of work?
01:11
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- Is work a scalar or a vector quantity?
01:28
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