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# How is kinetic energy used?

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Kinetic energy is used by exploiting the motion of an object. For example, the energy of a moving piston in an automotive engine provides transportation. The kinetic energy of moving water powers hydroelectric dams that provide electricity.

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There are many uses of kinetic energy in sports. A pitcher transfers the kinetic energy of his pitching arm to a baseball. A batter uses the kinetic energy of a swinging bat to amplify the energy in a pitched ball to get on base or score a run. Similarly, a tennis player swings a racket to amplify the kinetic energy of a tennis ball.

Creating electricity through the motion of wind is another example of how kinetic energy is used. Wind turbines change the kinetic energy of wind to rotary motion that turns electrical generators. Wind turbines can be used not only to generate electricity, but also to pump water from underground wells.

Kinetic energy is the energy of an object in motion and is relative to the object's mass and velocity. The kinetic energy of water or wind is based on the accumulation of the mass of many small particles working together. Kinetic energy can be transferred or stored, but is never lost, as defined by the law of conservation of energy.

## Related Questions

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Kinetic friction refers to the frictional force of a moving object. If a force is being applied on a stationary object, friction is considered a static force until movement occurs.

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The law of inertia is a fundamental physics principle used to describe how an object behaves in motion or at rest, particularly when forces are applied to it. The object can be anything that has mass.

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The law of inertia states that an object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force. The law of inertia is sometimes referred to as Newton's first law of motion.

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Friction is a force that opposes motion, so it is unhelpful in all situations where the motion of an object is desired. A by-product of friction is that energy is wasted in the form of heat, which can cause problems in temperature-sensitive environments.