Final answer:
To calculate the net force on particle q3 in a Physics problem, one must use Coulomb's Law, which involves the magnitudes of the charges, the distances between them, and the direction of the forces, taking into account that like charges repel and opposite charges attract.
Step-by-step explanation:
Finding the Net Force on a Charge
To find the net force on particle q3 due to charges q1 and q2, we apply Coulomb's law, which states that the force between two point charges is proportional to the product of the magnitudes of the charges and inversely proportional to the square of the distance between them: F = k * |q1*q2| / r^2, where k is Coulomb's constant (8.988 × 10^9 Nm^2/C^2).
First, we calculate the force exerted on q3 by q1 (F31), which are separated by the sum of the distances between q1 and q2 and q2 and q3. Then, we calculate the force exerted on q3 by q2 (F32), taking into account their charge magnitudes and the distance between them. Both of these forces will act along the line connecting the charges, but in opposite directions due to the difference in sign of the charges.
To find the net force (net F on q3), we subtract the force exerted by q2 on q3 from the force exerted by q1 on q3 if they are in the same direction, or add them if they are in opposite directions. The actual calculation would require the use of the charges and distances as detailed in the question, and a consideration of vector directions for the forces.