A 45-Kg Girl Skating Due South at 7 M/s Collides

question 44

Multiple Choice

A 45-kg girl skating due south at 7 m/s collides with a 30-kg boy moving east at 5 m/s.Their common velocity in m/s is

• A)3 - 7 .
• B)2 - 4.2 .
• C)5 - 9 .
• D)6 - 3

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