Final answer:
The force required to accelerate a 70 kg skier at 2 m/s² is found using Newton's second law of motion, resulting in a force of 140 Newtons.
Step-by-step explanation:
To calculate the force needed to accelerate a 70 kg skier at 2 m/s², we can use Newton's second law of motion, which states that force equals mass times acceleration (F = m × a).
Given:
- Mass (m) = 70 kg
- Acceleration (a) = 2 m/s²
Force (F) required is calculated as follows:
- F = m × a = 70 kg × 2 m/s²= 140 N
Therefore, a force of 140 Newtons is needed to accelerate the skier at the given acceleration.