Question

A young girl with mass 39.5 kg is sliding on a horizontal, frictionless surface with an initial momentum that is due east and that has magnitude 85.5 kg⋅m/s . Starting at 0 s , a net force with magnitude F=( 8.35 N/s )t and direction due west is applied to the girl. A) At what value of t does the girl have a westward momentum of magnitude 64.5 kg⋅m/s ? B)How much work has been done on the girl by the force in the time interval from t= 0 s to the time calculated in part A? C) What is the magnitude of the acceleration of the girl at the time calculated in part A?

Answer 1

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