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A father racing his son has half the kinetic energy of the son, who has...

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Question

Physics

A father racing his son has half the kinetic energy of the son, who has two-fifthsthe mass of the father. The father speeds up by 3.0m/s and then has the same kinetic energy as the son.

(a) What is the original speed of the father?
m/s

(b) What is the original speed of the son?
m/s

Answer & Explanation Solved by verified expert
4.4 Ratings (649 Votes)
First you need the equation of KE which is KE 12 m v2 Call the mass of the father M and assume hes running at speed V The son has speed v Just writing down what you are told at the beginning gives you 212 M    See Answer
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