# Find the kinetic energy of a Soyuz spacecraft with a mass of 6.6 m as it moves in orbit at a speed of 7800 m / s

October 8, 2021 | education

| Initial data: m (mass of the Soyuz spacecraft) = 6.6 t (6.6 * 10 ^ 3 kg); V (speed of movement of the Soyuz spacecraft in orbit) = 7800 m / s.

We define the kinetic energy of the Soyuz spacecraft by the formula: Ek = 0.5 * m * V ^ 2.

Calculation: Ek = 0.5 * 6.6 * 10 ^ 3 * 78002 = 200.77 ^ 2 * 10 ^ 9 J ≈ 201 GJ.

Answer: The Soyuz spacecraft has a kinetic energy of 201 GJ.

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