Final answer:
The net force cannot be determined without the angular acceleration.
Step-by-step explanation:
The magnitude of the net force on a 5.0 g lump of clay that rides on the wheel 10 cm from the axis can be calculated using the equation F = m * a, where F is the net force, m is the mass, and a is the acceleration. In this case, the mass of the clay is given as 5.0 g, which is equivalent to 0.005 kg. The distance from the axis is given as 10 cm, which is equivalent to 0.1 m.
The acceleration can be determined using the formula a = r * α, where r is the distance from the axis and α is the angular acceleration. However, since the angular acceleration is not given in the question, we cannot determine the net force directly.
Therefore, without knowing the angular acceleration, we cannot calculate the magnitude of the net force on the clay lump.