Consider the following statementsStatement I: Work is done when book i...
Explanation:
Let us understand the concept of work and its definition. Work is said to be done when a force is applied on an object and the object moves in the direction of the force applied. The amount of work done is equal to the product of force applied and the distance moved by the object in the direction of the force.
Statement I: Work is done when book is pushed across the table.
In this statement, a force is applied on the book and the book moves in the direction of the force. Therefore, work is said to be done. Hence, Statement I is true.
Statement II: Work is done when a heavy wall is pulled.
In this statement, a force is applied on the wall but the wall does not move in the direction of the force applied. Therefore, work is not said to be done. Hence, Statement II is false.
Therefore, the correct option is A: Statement I is true and II is false.
Note: It is important to note that work is only done when the object moves in the direction of the force applied. If the object does not move, no work is said to be done.