The statements that applies are:
The net force is simply known as a collection (combination) of force of all self (individual) forces acting on an object. When net force is zero, the acceleration a must also be zero
A skateboarder is someone who drives a skateboard and the net force pushing him is a combination of forces causing his acceleration and it is towards the direction or way that the force is going to
Conclusively we can therefore say that skateboarder is moving in the direction of the net force because he is acting on it.
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