Question

Read the passage given below and answer the questions that follow:




In day to day life we considered any useful physical or mental labour as work. a Activitieslike playing in a field talking with friends humming a tune watching a movie attending afunction are sometimes not considered to be work. What constitutes work depends on theway we define it. We use and define the term work differently in science.



a) How is 'work' done in day to day life different from a scientific conception?
b) What happens to the energy of an object which does work and on which work isdone?
c) Give one example each of positive work and negative work.
d) Saloni stands still for a few minutes with heavy load of 15 kg on her head 1.5 metreabove the ground. Calculate the work done by her.`​

Answer 1

1. Activities like playing in a field talking with friends humming a tune watching a movie attending a function are sometimes not considered to be work.
2. OBJECT WHICH DOES WORK IS POSITIVE ON WHICH WORK IS DONE IS NEGATIVE
3. WHEN WE PUSH A TABLE WE PUT POSITIVE WORK AND THE TABLE EXPERIENCES NEGATIVE WORK.
4. U= mgh. $15 \times 10 \times 1.5 = 225 \: joules$

Answer 2

Answer:

Playing in a field is a physical work it requires more labour or energy while we don't need much labour for chatting with someone or humming a music

Explanation:

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