Final answer:
The force required to accelerate a 50 kg skier at 3 m/sec² is 150 Newtons, calculated by multiplying the mass by the acceleration (F = ma).
Step-by-step explanation:
To calculate the force needed to accelerate a 50 kg skier at 3 m/sec², we use Newton's second law of motion, which states that the force applied on an object equals its mass multiplied by the acceleration (F = ma). For the skier, the mass (m) is 50 kg and the acceleration (a) is 3 m/sec². Using the formula:
F = ma
F = 50 kg × 3 m/sec²
F = 150 N
Therefore, the force required to accelerate the skier is 150 Newtons.