iPad 9:07 PM 74% session.masteringphysics.com lik blackboa (15) kineti...(16) Co

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iPad 9:07 PM 74% session.masteringphysics.com lik blackboa (15) kineti...(16) Conse.... 8:44 PM 6 Course Ho. HW1025 se Ho... HW1025 Exercise 8.18 a previous | 3of4 Inext Exercise 8.18 Two figure skaters, one weighing 650 N and the other 725 N.push off against each other on very smooth lce Part A the heavier skater tavots at 1 60 m/s . how fast will the igher one traver? 1.78 m/s My Answers Give Up Incorrect; Try Again; 3 attempts remaining Part B How much kinetic energy is "created during the skaters' maneuver K-1760 My Answers Gve Up Incorrect; Try Again; 5 attempts remaining Part c Where does this energy come from? Essay answers are limited to about 500 words (3800 characters maximum, including spaces) 3800 Character(s) remaining My Answers Give Up

Explanation / Answer

Let M = mass of the heavier skater, m = mass of the lighter skater

V = velocity of the heavier skater, v = velocity of the lighter skater

To find M and m, divide the given weights by the acceleration due to gravity which is 9.8 m/s2

M = 74 kg, m = 66.33 kg

using law of conservation of momentum:

0 = MV + mv

-MV = mv

v = -MV/m = - 1.78 m/s

Kinetic Energy = (1/2) m v2

Total Kinetic Energy = (1/2) M V2 + (1/2) m v2

Total KE = 200.33 J

Energy comes from the work done by the skaters. They both apply a force over a certain distance (length of their arms)

Please rate my answer if you find it helpful, good luck...

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