To find the net force acting on the roller coaster, you can use Newton's second law, which states that Force (F) equals mass (m) times acceleration (a).
Here, the mass (m) of the roller coaster is 2000 kg, and the acceleration (a) is 2 m/s².
Using the formula:
\[ F = m \times a \]
Substituting the values:
\[ F = 2000 , \text{kg} \times 2 , \text{m/s}^2 \]
\[ F = 4000 , \text{N} \]
Thus, the net force acting on the roller coaster is 4000 N.