http://www.cramster.com/answers-nov-11/physics/bricks-1-bricklayer-working-roof-

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http://www.cramster.com/answers-nov-11/physics/bricks-1-bricklayer-working-roof-6-storey-build_1717591.aspx?rec=0

http://www.cramster.com/answers-nov-11/physics/bricks-2-refering-link-answer-question-http_1725973.aspx?rec=0

http://www.cramster.com/answers-nov-11/physics/bricks-3-refering-links-answer-question-http-wwwcr_1725977.aspx?rec=0

http://www.cramster.com/answers-nov-11/physics/bricks-4-http-wwwcramstercom-answers-nov-11-physics-bricks-1-bric_1725979.aspx?rec=0

5) Determine the kinetic energy of the barrel when it hits the bricklayer on his way down the building.

Explanation / Answer

So I am not sure if they want us to include the bricks so the mass is either 20kg or 200kg depending. I will suppose both. We know the velocity of the barrell is 9.9 m/s so the kinetic energy is 1/2mv^2=0.5*200*9.9^2=9801J

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