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A man weighing 680N and a woman weighing 500N have the same momentum. What is the ratio of the man's kinetic energy Km to that of the woman Kw?

A cardinal (Richmondena cardinalis) of mass 3.60

Answer :

Answer:

[tex]\dfrac{K_m}{K_w}=0.734[/tex]

Explanation:

given,

weight of the man = 680 N

weight of the woman = 500 N

mass of man = [tex]\dfrac{680}{9.8}[/tex]

  M_m = 69.4 Kg

mass of woman

= [tex]\dfrac{500}{9.8}[/tex]

M_w = 51 Kg

ratio of man's kinetic energy Km to that of the woman Kw

[tex]\dfrac{K_m}{K_w}=\dfrac{\dfrac{P_m^2}{2M_m}}{\dfrac{P_w^2}{2M_w}}[/tex]

momentum is same

[tex]\dfrac{K_m}{K_w}=\dfrac{2M_w}{2M_m}[/tex]

[tex]\dfrac{K_m}{K_w}=\dfrac{M_w}{M_m}[/tex]

[tex]\dfrac{K_m}{K_w}=\dfrac{51}{69.4}[/tex]

[tex]\dfrac{K_m}{K_w}=0.734[/tex]

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