FIGURE 11-3
-A mill grinds corn by means of a grinding wheel attached to a long horizontal axle that is hinged to a vertical rotating axle as shown in Figure 11-3. The rotation of the vertical axle forces the horizontal axle to follow it. Thus, the wheel moves in a circular path, and its motion makes it rotate. The wheel then crushes the corn in its path. The force exerted by the wheel on the corn is
A) equal to the weight of the wheel.
B) greater than the weight of the wheel.
C) less than the weight of the wheel.
D) There is not enough information to answer this question.

Question

FIGURE 11-3 
-A mill grinds corn by means of a grinding wheel attached to a long horizontal axle that is hinged to a vertical rotating axle as shown in Figure 11-3. The rotation of the vertical axle forces the horizontal axle to follow it. Thus, the wheel moves in a circular path, and its motion makes it rotate. The wheel then crushes the corn in its path. The force exerted by the wheel on the corn is
A) equal to the weight of the wheel. 
B) greater than the weight of the wheel. 
C) less than the weight of the wheel. 
D) There is not enough information to answer this question.

Quizplus · Accepted Answer

The force exerted by the wheel on the corn is greater than the weight of the wheel, as the wheel is rotating and crushing the corn, thus applying a force greater than just its weight.

FIGURE 11-3 -A Mill Grinds Corn by Means of a Grinding Wheel