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# Kinetic Energy

Energy is the currency of transformation. All systems remain the same unless energy is exchanged between one part and another. Learn here about the energy associated with movement.

When a ball is thrown up into the air, how does its kinetic energy change with time?

Two trucks of equal mass are moving towards each other at equal speeds.

One of the truck driver calculates the total kinetic energy of the trucks.

A person standing on the ground also calculates the total kinetic energy of the trucks.

Who has calculated a greater value of kinetic energy?

If the speed of a ship doubles, then what happens to its kinetic energy?

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