The image shows a physics problem where the equation of motion for a body with a mass of 2 kg is given as:

$x = 7 \cdot t + 4 \cdot t^2$

You are required to find:

1. Gravitational Force (N): This is the weight of the object.
2. Initial Momentum (kg·m/s): The momentum at $t = 0$.
3. Initial Kinetic Energy (J): The kinetic energy at $t = 0$.
4. Resultant Force (N): The net force acting on the body.

Let's break down each step:

1. Gravitational Force (N): $F_g = m \cdot g$ Where $m = 2 \, \text{kg}$ and $g \approx 9.8 \, \text{m/s}^2$. $F_g = 2 \times 9.8 = 19.6 \, \text{N}$

2. Initial Momentum (kg·m/s): Momentum $p$ is given by $p = m \cdot v$, where ( v