Answer :
Final answer:
The net external force on Andrea, who weighs 76.0 kg and accelerates at 1.48 m/s², is calculated using Newton's second law (F = m * a), resulting in a force of approximately a) 112 N.
Explanation:
To determine the net external force on Andrea, a 76.0 kg sprinter, with an acceleration of 1.48 m/s², we use Newton's second law of motion, which states that the net external force on an object is equal to the mass of the object multiplied by its acceleration (F = m * a). In this case, the net external force can be calculated as follows:
F = m * a
F = 76.0 kg * 1.48 m/s²
F = 112.48 N
Therefore, the net external force on Andrea is approximately 112 N, which corresponds to option a).
