Question

Choose the best alternative in each case.
In which of the following case is work done?
i. Looking after a business house by sitting on a chair in front of it
ii. Caring children and teaching them
iii. Reading a book by sitting on a chair
iv. Pushing a stone through some distance by applying force​

Answer 1

Answer:

iv) pushing a stone through some distance by applying force

because work done = force × displacement

in rest of the cases there is no displacement

so no work is done .

but in iv) case we have both

hence your answer is iv)

have a great day ahead :)