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8. A rocket is launched into space; its kinetic energy is given by $K = frac{1}{2}mv^2$, where $K$ is the kinetic energy in joules, $m$ is the mass of the rocket in kilograms, and $v$ is the velocity of the rocket in meters per second. Assume the velocity is increasing at a rate of 15 m/sec² and the mass is decreasing at a rate of 10 kg/sec because the fuel is being burned. At what rate is the rocket's kinetic energy changing when the mass is 2,000 kg and the velocity is 5,000 m/sec? Give your answer in megajoules (MJ), which is equivalent to $10^6$ J.

          8. A rocket is launched into space; its kinetic energy is given by $K = frac{1}{2}mv^2$, where $K$ is the kinetic energy in joules, $m$ is the mass of the rocket in kilograms, and $v$ is the velocity of the rocket in meters per second. Assume the velocity is increasing at a rate of 15 m/sec² and the mass is decreasing at a rate of 10 kg/sec because the fuel is being burned. At what rate is the rocket's kinetic energy changing when the mass is 2,000 kg and the velocity is 5,000 m/sec? Give your answer in megajoules (MJ), which is equivalent to $10^6$ J.

$8. A rocket is launched into space; its kinetic energy is given by K = frac12mv^2, where K is the kinetic energy in joules, m is the mass of the rocket in kilograms, and v is the velocity of the rocket in meters per second. Assume the velocity is increasing at a rate of 15 m/sec² and the mass is decreasing at a rate of 10 kg/sec because the fuel is being burned. At what rate is the rocket's kinetic energy changing when the mass is 2,000 kg and the velocity is 5,000 m/sec? Give your answer in megajoules (MJ), which is equivalent to 10^6 J.$

Added by Michelle F.

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