× Google i >. e A Piece Of Luc (74) Work and O Potential Enerx Y × www.saplingle

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× Google i >. e A Piece Of Luc (74) Work and O Potential Enerx Y × www.saplingle × www.saplingle ×.. www.saplingle × McNeese Stat × ( d www.saplinglearning.com/ibiscms/mod/ibis/view.php?id=3805084 PrintCalculator Periodic Table Question 19 of 20 100 Sapling Learning 43 Sir Dudley the Dextrous is loading cannons on top of the castle's tallest towers in preparation for an expected attack. He slips, and a 6.00 kg cannonball rolls to the edge of the tower (which has a perfectly horizontal surface), and falls to the ground below. It takes the cannonball 2.15 seconds to fall to the ground, and air resistence is negligible. How much work is done by gravity on the falling cannonball? 10 19 50 Number 100 12 During the fall, what is the average power transfer to the cannonball due to the force of gravity? 13 Number 4 100 16 17 18 19 Previous O Check Answer ) Next Exit

Explanation / Answer

Fall distance = 1/2 (t^2 x g) = 22.65 metres.

It's a 6 kg. cannonball.

Gravitational force = (g x 6) = 9.8 x 6 = 58.8N.

Work done by gravity = (58.8 x 22.65m) = 1331.82 J

Power average = (1331.82/2.15) = 619.45 W

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