[" Questions "],[" 1.When do we say that work is done? "]

When do you say that body has done no work?

Why do we say that stone is a solid ?

Study the pictures given below and answer the questions: From scientific point of view, when do we say that no work was done?

Answer the following : In the figure alongside , a string , attached to a wooden block on a table , is passed over a pully and tied to a weight . On applying a sufficient weight, the block will be seen to move : When can we say that work is done by the applied force ?:

From scientific point of view,when do we say that no work was done?

When can we say that an object is in motion?

When do we say that a body is retarding or decelerating?

When do we say that a bucket is bigger than a cup?