Understanding the Concepts

* Newton's Second Law of Motion: This law states that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass. Mathematically, this is expressed as:

* F = m * a

* Where:

* F = net force (in Newtons)

* m = mass (in kilograms)

* a = acceleration (in meters per second squared)

Solving the Problem

1. Identify the knowns:

* Force (F) = 64 Newtons

* Mass (m) = 20 kg

2. Rearrange the formula to solve for acceleration (a):

* a = F / m

3. Plug in the values and calculate:

* a = 64 N / 20 kg

* a = 3.2 m/s²

Answer: The acceleration of the wagon is 3.2 meters per second squared.