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A circular rock 5 km in radius hits the earth head-on, at speed 36 km/s. The...

A circular rock 5 km in radius hits the earth head-on, at speed 36 km/s. The rock's density is 3 g/cm3. The earth's mass is 6*1024 kg. Treating the earth as initially stationary, calculate its final in speed due to the impact.

Because of the system's trouble with small numbers, calculate the speed in μm/s -- the distance unit is the micron or micrometer, 10-6 meter.

I am so confused on where to start, like is the rocks density m2 and earths mass m1? please help

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genius_generous answered 2 years ago
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