Work

key notes :

Definition of Work:

• Work is done when a force is applied to an object, and the object moves in the direction of the force.

Conditions for Work:

• A force must be applied.
• The object must move.
• The movement must be in the same direction as the applied force.

Examples of Work:

• Pushing a cart and making it move forward.
• Pulling a rope to lift a bucket.

Non-Examples of Work:

• Holding a book without moving it (no movement).
• Pushing against a wall that does not move (no motion occurs).

Force and Work:

• The amount of work depends on the strength of the force and the distance the object moves.

Everyday Examples of Work:

• Riding a bicycle.
• Lifting groceries.
• Pulling a toy car.

Work in Nature:

• Animals carrying loads.
• Flowing water turning turbines.

Tools That Help in Work:

• Simple machines like levers, pulleys, and ramps make work easier by reducing the effort needed.

Energy and Work:

• Work requires energy.
• The energy used to do work comes from food, fuel, or other sources.

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