Consider a situation where you lift a book from the ground onto a shelf. Which of the following affects the work you do in lifting the book?
The path taken by the book
The time it takes to lift the book
The height of the shelf
The mass of the book
The strength in your arms
The path taken by the book: The path taken by the book does not affect the work done in lifting the book. Work is defined as the product of force and displacement, and the path taken does not directly impact the force or displacement involved in lifting the book.
The time it takes to lift the book: The time it takes to lift the book does not directly affect the work done. Work is only dependent on the force applied and the displacement achieved, not the time taken to perform the task.
The height of the shelf: The height of the shelf does affect the work done in lifting the book. The work done is the product of the force applied and the vertical displacement. Lifting the book to a higher shelf requires more work.
The mass of the book: The mass of the book does affect the work done in lifting the book. The work done is the product of the force applied and the vertical displacement. Lifting a heavier book requires more work.
The strength in your arms: The strength in your arms can affect the work done in lifting the book. If you have more strength in your arms, you can exert a greater force and do more work in lifting the book. However, the work done also depends on the height of the shelf and the mass of the book, so strength alone is not the sole factor affecting the work.