Question

1. a 20 kg object is subject to a 4 m/s² acceleration. what is the net force?

Explanation:

Step1: Recall Newton's Second Law

Newton's second law states that the net force \( F \) acting on an object is equal to the mass \( m \) of the object multiplied by its acceleration \( a \), i.e., \( F = ma \).

Step2: Substitute the given values

We are given that the mass \( m = 20 \, \text{kg} \) and the acceleration \( a = 4 \, \text{m/s}^2 \). Substituting these values into the formula, we get \( F = 20 \, \text{kg} \times 4 \, \text{m/s}^2 \).

Step3: Calculate the net force

Calculating the product, \( 20 \times 4 = 80 \). The unit of force is the newton (N), where \( 1 \, \text{N} = 1 \, \text{kg} \cdot \text{m/s}^2 \), so the net force is \( 80 \, \text{N} \).

Answer:

The net force is \( \boldsymbol{80 \, \text{N}} \).