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The 3,000 kg weight will drop from 6.0m to pile weighing 500 kg and drove it...

The 3,000 kg weight will drop from 6.0m to pile weighing 500 kg and drove it 3.0 cm into the rock. The crash is perfectly inflexible. Determine the average resistance force, which the pilot acts on the rock for as long as his movement completely stops.

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