Understanding the Concepts

* Force (F): The push or pull that can change an object's motion. Measured in Newtons (N).

* Mass (m): The amount of matter in an object. Measured in kilograms (kg).

* Acceleration (a): The rate of change of velocity. Measured in meters per second squared (m/s²).

Newton's Second Law of Motion

Newton's Second Law of Motion states the following relationship:

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

Calculation

1. Identify the values:

* Mass (m) = 900 kg

* Acceleration (a) = 6 m/s²

2. Apply the formula:

* Force (F) = 900 kg × 6 m/s²

* Force (F) = 5400 N

Answer: It would take a force of 5400 Newtons to accelerate a 900-kg car at a rate of 6 m/s².