Newton's Second Law of Motion

Newton's Second Law of Motion states:

* Force (F) = Mass (m) x Acceleration (a)

Solving for Acceleration

1. Rearrange the equation: a = F / m

2. Plug in the values: a = 21 N / 82 kg

3. Calculate: a ≈ 0.26 m/s²

Answer: The acceleration of the couch is approximately 0.26 meters per second squared.