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charle [14.2K]
3 years ago
12

Calculate the kinetic energy of a 100.0-kg meteor approaching the Earth at a speed of 10.0 km/s. Remember that 1 km = 1000 m.

Physics
2 answers:
Alex17521 [72]3 years ago
8 0
Kinetic Energy = (1/2) (mass) (speed squared)

Mass = 100 kg
Speed = 10 km/s = 10,000 m/s
Speed squared = 100,000,000 m²/s²

1/2 (M)(V²) = 1/2 (100) (100,000,000) = 5,000,000,000 joules  (5 x 10⁹ J)

That's  5 billion joules.

That's the amount of energy a 100-watt light bulb uses in  579 days.
olchik [2.2K]3 years ago
5 0
KE=1/2 x mass x speed^2
Substitute:

KE=1/2 x 100 x 10000^2
5000000000J of KE
So either <u>5 gigajoules</u>
Or <u>5x10^9J</u>
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