| The farther away a quark moves, the more gluons appear, each contributing to the net force. |
| The result is to generate a net force that tends to straighten out the curve into a cylindrical tube. |
| The curved path demands this observer to recognize a leftward net force on the ball. |
| For a body to be in equilibrium, there must be no net force acting on it. |
| In reality, the magnetic field felt by a compass needle is essentially uniform over the length of a compass needle and as a result the net force on the needle is zero. |
| Because the piston seal area is greater than the main seat sealing area, the net force on the piston is downward, keeping the valve tightly closed. |
