Final answer:
Heat is transferred due to frictional forces when different materials at various temperatures come into contact with a moving object, primarily through conduction, which involves direct contact, or convection, involving fluid movement.
Step-by-step explanation:
When gases, liquids, or solids are in contact with a moving object, the flow of heat occurs due to frictional forces. This happens because when two substances are at different temperatures and in contact, thermal energy transfers from the hotter substance to the cooler one. The methods by which this transfer occurs are known as conduction, convection, and radiation. Conduction is the direct transfer of heat through physical contact. Convection is the transfer of heat due to the movement of fluids (gases or liquids) where the hotter, less dense material rises, and the cooler, denser material sinks, creating a flow that distributes heat. Lastly, radiation is the transfer of heat through electromagnetic waves without the need for a medium.