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Unformatted text preview: F J ) and Force on Moe( F M ) have same magnitude and opposite direction. Joe’s mass, m J is W J /g = 500N / 9 . 8m / s 2 = 51kg. Moe’s mass, m M is W M /g = 750N / 9 . 8m / s 2 = 76 . 63kg. mass of skateboards m s is 5kg. (a) F J = ( m J + m s ) a J , a J = F J / ( m J + m s ) = 150N / (51 + 5)kg = 2 . 68m / s 2 . (b) F M = ( m M + m s ) a M , a M = F M / ( m M + m s ) = 150N / (76 . 63 + 5)kg = 1 . 84m / s 2 . (c) Joe’s speed = 2 . 68m / s 2 × 3s = 8 . 04m / s. Moe’s speed = 1 . 84m / s 2 × 3s = 5 . 52m / s. 2...
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 Spring '08
 MODI
 Addition, Force, Mass, Velocity, Kilogram, opposite direction

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