To lift a book through a height, you must apply a force. The book rises up as a result of the force applied.
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Saroj Shahani
Asked: In: Class 9 Science
Yes, another example is when you lift a book from the floor to a table. You exert an upward force on the book, and the book moves upwards through a distance. Hence, work is done according to the scientific definition.
Saroj Shahani
Asked: In: Class 9 Science
The necessary conditions for work to be done in the provided examples are that a force must be exerted on an object, and the object must be displaced through a distance as a result of the force.
When a girl pulls a trolley, the trolley moves through a distance. The girl exerts a force on the trolley, and the trolley gets displaced. Therefore, work is done.
Saroj Shahani
Asked: In: Class 9 Science
The everyday definition of work includes any useful physical or mental labor, while the scientific definition specifically involves force causing displacement.