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A roller coaster with a mass of 1000 kg is shot to a speed of 30 m/s in 8 seconds. How much kinetic energy does this coaster have at the end of the 8 seconds?

Respuesta :

Answer:

450,000 Joules

Explanation:

KE = 1/2 * m * v^2

KE = 1/2 * 1000kg * (30m/s)^2

    = 1/2 * 1000 * 900 kg*m^2/s^2

    = 450,000 Joules

(the 8 seconds is a red herring - you don't need to know that)

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