Understanding the Concepts

* Work: Work is done when a force causes an object to move a certain distance. It's calculated as: Work (W) = Force (F) × Distance (d)

* Net Force: The net force is the overall force acting on an object. In this case, the net force is the applied force (70N) minus the force of friction (which we'll assume is negligible).

Solving the Problem

1. Assume Negligible Friction: Since the problem doesn't mention friction, we'll assume it's small enough to ignore. This means the net force is simply the applied force of 70N.

2. Calculate Work:

* Work (W) = Force (F) × Distance (d)

* W = 70N × 10m

* W = 700 Joules (J)

Answer: The work done on the brick is 700 Joules.