Acrate is sliding along the ground with no applied force. and is slowing down at a rate of 2.7 meters per second. the crate has a mass of 4kg. what is the coefficient kinetic friction ?

Ahydroelectric plant takes energy from water and turns it into electrical energy. what are the transformations of energy in the water molecules that are used in the process of generating electricity this way?

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What properties of a moving object are used in determining the object's energy of motion