Doubtly : Engineering - Notes, Viva, Questions, and Answers

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What is the law of conservation of energy?

answered Apr 8, 2022 in Chapter 2 Work and Energy by Doubtly (98.9k points)

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Into which form are the chemical energy stored in the exploding firecrackers converted to?

answered Apr 8, 2022 in Chapter 2 Work and Energy by Doubtly (98.9k points)

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Ajay and Atul have been asked to determine the potential energy of a ball of mass m kept on a table as shown

answered Apr 8, 2022 in Chapter 2 Work and Energy by Doubtly (98.9k points)

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What is the potential energy?

answered Apr 8, 2022 in Chapter 2 Work and Energy by Doubtly (98.9k points)

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What is kinetic energy?

answered Apr 8, 2022 in Chapter 2 Work and Energy by Doubtly (98.9k points)

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Define energy. What is its unit?

answered Apr 8, 2022 in Chapter 2 Work and Energy by Doubtly (98.9k points)

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Pravin has applied a force of 100 N on an object, at an angle of 600 to the horizontal. The object gets displaced

answered Apr 8, 2022 in Chapter 2 Work and Energy by Doubtly (98.9k points)

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Calculate the work done to take an object of mass 20 kg to a height of 10 m. (g = 9 8 m/s2)

answered Apr 8, 2022 in Chapter 2 Work and Energy by Doubtly (98.9k points)

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Write about the National Physical Laboratory.

answered Apr 8, 2022 in Chapter 2 Work and Energy by Doubtly (98.9k points)

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Give an example of where the work done by the gravitational force is zero.

answered Apr 8, 2022 in Chapter 2 Work and Energy by Doubtly (98.9k points)

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With the force and the displacement specified, define the work done by the force.

answered Apr 7, 2022 in Chapter 2 Work and Energy by Doubtly (98.9k points)

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Define the relationship between joule and erg using the equation.

answered Apr 7, 2022 in Chapter 2 Work and Energy by Doubtly (98.9k points)

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Explain unit of work as per SI and CGS system.

answered Apr 7, 2022 in Chapter 2 Work and Energy by Doubtly (98.9k points)

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The work done on an object does not depend on .... (i) displacement (ii) applied force

answered Apr 7, 2022 in Chapter 2 Work and Energy by Doubtly (98.9k points)

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If we increase the velocity of a car moving on a flat surface to four times its original speed, its potential energy

answered Apr 7, 2022 in Chapter 2 Work and Energy by Doubtly (98.9k points)

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The total energy of an object falling freely towards the ground ... (i) decreases (ii) remains unchanged

answered Apr 7, 2022 in Chapter 2 Work and Energy by Doubtly (98.9k points)

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The potential energy of your body is least when you are ..... (i) sitting on a chair (ii) sitting on the ground

answered Apr 7, 2022 in Chapter 2 Work and Energy by Doubtly (98.9k points)

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While dragging or lifting an object, negative work is done by (i) the applied force (ii) gravitational force

answered Apr 7, 2022 in Chapter 2 Work and Energy by Doubtly (98.9k points)

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Power is a measure of the ....... (i) the rapidity with which work is done (ii) amount of energy required to perform

answered Apr 7, 2022 in Chapter 2 Work and Energy by Doubtly (98.9k points)

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Which of the forces involved in dragging a heavy object on a smooth, horizontal surface, have the same magnitude?

answered Apr 7, 2022 in Chapter 2 Work and Energy by Doubtly (98.9k points)

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