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Work-energy
Work-Energy Work and energy are related concepts in mechanics that describe the changes in an object's motion or energy due to forces acting on it. Work...
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Work-Energy Work and energy are related concepts in mechanics that describe the changes in an object's motion or energy due to forces acting on it. Work...
Work and energy are related concepts in mechanics that describe the changes in an object's motion or energy due to forces acting on it.
Work is the scalar product of the force and the displacement of the object in the direction of the force. It is a positive value for work done in the direction of the force, and a negative value for work done against the force.
Energy is the ability to do work. It is a scalar quantity, meaning it has only magnitude and no direction.
The total work done on an object is equal to the change in its energy. This principle can be used to calculate the amount of work done by a force on an object, or the total work done by forces acting on an object during a specific motion.
Examples:
When a force pushes an object, the work done is positive, as the object's motion is in the direction of the force.
When a force pulls an object, the work done is negative, as the object's motion is against the force.
When a force stops an object, the work done is equal to the negative change in its energy.
When a force applies a constant force to an object, the work done is equal to the product of the force and the displacement.
When an object is thrown in the air, the work done by the force of gravity is negative, as the object's energy is decreasing due to the gravitational potential energy