A plane weighing 220 kN (25 tons) lands on an aircraft carrier. The plane is moving horizontally at 64.0 m/s (141 mi/h) when its tailhook grabs hold of the arresting cables. The cables bring the plane to a stop in a distance of 84.0 m.(adsbygoogle = window.adsbygoogle || []).push({});

(a) How much work is done on the plane by the arresting cables?

(b) What is the force (assumed constant) exerted on the plane by the cables?

(a)

For this problem I used

Work = K where K =1/2(mv^2)

k=1/2((220)(64^2))

k = 450.56

(b) work = F*x

450.56 = F*84

F=5.36

However, I got it wrong. What am I doing wrong?

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# Homework Help: A problem about spring constant

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