A person holds a bundle of hay over his head for 30 minutes and gets tired. Has he done some work or not ? Justify your answer.

What is the amount of work done by a boy when (i) he holds a bundle of books of mass 2 kg for 5 minute? (ii) be lifts up the same bundle of books through 1 metre to keep it on his study table?

What is the work done by the force of gravity on a satellite moving round the Earth ? Justify your answer.

A potter working on his wheel shaped a lump of clay into a pot. He then baked the pot in an oven. Do these two acts lead to the same kind of changes or different? Give your opinion and justify your answer.

Paheli does not have a night lamp in her room. She covered the bulb of her room with a towel in the night to get dim light. Has she taken the right step? Give one reason to justify your answer.

Imagine this hypothetical situation. The wealth possessed by the richest person of this world is Avogadro number (6.023xx10^(23)) of dollars. He thought of donating his entire wealth to the needy. and make their living healthy. His life span is assumed to be 90 years and he is now 45. The rate of donation is 5000 dollars per second and from now, every second of his existence is only used for donation. Can he empty all his wealth in this life? Justify your answer.

'A manager is of the view that he is not responsible for the quality of work that he has delegated to his subordinate.'' Do you agree with this viewpoint? Justify your answer by giving proper arguments.

Some of the sentences have errors and some have none. Find out which part of a sentence has an error. The number of that part is your answer. If there is no error, your answer is (4) Judge in him (1)/ prevailed upon the father (2)/ and he sentenced his son to death. (3)/ No error

In the following questions, some of the sentences have errors and some have none. Find out which part of a sentence has an error. The number of that part is your answer. Your answer is (4) 1.e., No error. He who has suffered most (1)/ for the cause, (2)/ let him speak. (3)/ No error (4)