Answer the following questions:
Suppose we stand in one place, hold a book in our hand and stretch the hand in the horizontal position.Is work being done on the book?

Answer the following questions: Give two examples of positive work done

Answer the following questions: Give one example in which a body is acted upon by forces, but the work done is zero.

Answer the following question: In which fields of work do we see computers being used?

Answer the following questions: State the condition under which the work done is (i) positive (ii) negative(iii) zero. Why is the work done on an object moving with uniform circular motion zero?

Answer the following questions: In the following case, state giving reasons whether the work done is positive or negative: Activity: A boy goes from the first floor to the third floor with his school bag. Force: The force applied by the boy.

Answer the following questions: In the following case, state whether work is done or not. Justify your answer: Activity: A student reads a book.

Answer the following questions: In the following case, state whether work is done or not. Justify your answer: Activity: A body slides on a frictonless horizontal surface with a uniform velocity.

Answer the following questions: In the following case, state giving reasons whether the work done is positive or negative: Phenomenon: A ripe fruit falling from a tree. Force: Gravitational force of the earth.

Answer the following questions : As per the request of one of his friends from the equator, Rahul buys 100 grams of silver at the north pole. He hands it over to his friend at the equator. Will the friend agree with the weight of the silver bought ? If not, why ?

Answer the following questions: In the following case, state whether work is done or not. Justify your answer: Activity: One applies a force on a big rock but fails to move it.