Define work done by a force and give some examples of it 

Work done by a force refers to the amount of energy transferred when the force causes an object to move. It depends on both the size of the force and the direction in which the object is displaced. In simple terms, work occurs when a force moves an object through a certain distance.

Work done by a force is the amount of energy transferred when a force moves an object in the direction of the force. 
In simple words, when you apply a force to move something, work is done.

Formula for Work Done

Work Done = Force × Displacement × cos θ

• Force: The push or pull applied on the object
• Displacement: The distance the object moves
• θ (theta): The angle between the force and the direction of movement

Examples of Work Done by a Force

1. Pushing a Box: When you push a box across the floor and it moves, you do work on the box.
2. Lifting a Book: When you lift a book from the ground to a table, you do work against gravity.
3. Pulling a Rope: When you pull a rope to drag something towards you, work is done on the object.
4. Throwing a Ball: When you throw a ball forward, your hand does work on the ball to move it.
5. Moving a Car: When a car engine applies force to move the car forward, work is done by the engine.