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: F = m * a

Calculation

* Force (F) = ? (This is what we want to find)

* Mass (m) = 45 kg

* Acceleration (a) = 2 m/s²

Substitute the values into the equation:

F = 45 kg * 2 m/s²

F = 90 N

Answer: You would need a force of 90 Newtons to accelerate your body at a rate of 2 m/s² if you weigh 45 kg.