Data: m (mass of the flying washer) = 160 g (0.16 kg); V (puck speed in flight) = 20 m / s.
The kinetic energy of the washer will be equal to half the product of its mass and the square of the speed of movement: Ek = 0.5 * m * V².
Calculation: Ek = 0.5 * 0.16 * 20² = 32 J.
Answer: The kinetic energy of a hockey puck is 32 J.
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