# Chapter 4 - Dynamics: Newton's Laws of Motion - Questions: 18

The less massive person, presumably the daughter, has the greater final speed.

#### Work Step by Step

By Newton’s third law, each person feels the same magnitude of force. By Newton’s second law, F = ma, the acceleration is a = F/m. For equal net forces acting on the 2 people for the same time interval, the smaller-mass person will have the greater acceleration and thus the greater final speed.

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