Answer the following questions:
In the following case, state whether work is done or not. Justify your answer:
Activity: A person carries some goods on a handcart.

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 whether work is done or not. Justify your answer: Activity: One applies a force on a big rock but fails to move it.

Answer the following questions: In the following case, state whether work is done or not. Justify your answer: Activity: A worker climbs a staircase with some load o n his head.

Answer the following questions: Define work.

Answer the following questions: In the following case, state whether work is done or not. Justify your answer: Phenomenon: The revoluition of the earth arpound the sun.

Answer the following questions: In the following case, state giving reasons whether the work done is positive or negative: Activity: A cyclist applies brakes to his bicycle, yet the bicycle covers some distance before coming to a halt. Force: the force applied by the brakes.

Answer the following questions : State the units of heat.

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 : State the uses of ethanol.