Low Stakes Q2

A 70 kg construction worker accidentally pushes a 100kg block of metal alloy off a 8 meter high stand. The block lands on top of a stake partially put into the ground, driving it completely into the dirt.

What is the kinetic energy of the block just before striking the stake? (The previous question revealed the final velocity of the block was 12.5 m/s.)

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Reveal Answer »

E = (1/2)mv2 = (1/2) (100kg) (12.5 m/s)2
E = 7840 J

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Low Stakes Q2

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