Should the selection of a rake dryer be based on power or torque?

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A rake dryer equipped with a 15KW-4 motor (a 4-stage motor); the frequency converter is a constant-torque type, meaning that the torque output by the motor remains constant. The belt pulley is used for reduction to drive the rake teeth in operation; currently, there is a situation where the teeth get stuck and the materials cannot be scraped. Analysis: The motor torque remains constant. Power is given by P = T × n (torque multiplied by speed); therefore, power decreases as the speed drops. Assuming a belt drive ratio of 2.5:1, and that the torques on the large and small pulleys are equal (assuming an efficiency of 1), the torque on the driven pulley is 2.5 times that of the driving pulley. Question: 1. Currently, the torque is higher while the power is lower, so it is unable to move the material. The torque increases (the moment force increases), while the power decreases (less work is done per unit of time, resulting in less energy). So, is it the magnitude of the force or the amount of work that determines whether a device can function properly? 2. Is changing an object’s state of motion determined solely by force (is that the only factor)?