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11 votes
11 votes
A sledgehammer of mass m = 1.9 kg falls freely vertically downward from a height of h = 2.6 m at an initial speed of v = 11 m/s before striking a partially buried piling. After the blow the piling has moved d = 0.075 m deeper.How much kinetic energy, in joules, does the sledgehammer have just before striking the piling?

User Tushar Jadav
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1 Answer

23 votes
23 votes

Answer:

Kinetic energy= 114.9J

Step-by-step explanation:

Greetings !

Given values :-

mass= 1.9kg

height=2.6m

velocity= 11m/s

displacement (d)= 0.075m

Required value :-

Kinetic energy (KE)

Solution :-

Firstly, recall the Kinetic energy equation


ke = (1)/(2) mv {}^(2)

substitute known variables into the equation


ke = (1)/(2) (1.9)(11) {}^(2)

solve for Kinetic energy


ke = 114.9j

Hope it helps!!!

User Costantino Grana
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3.1k points