Food science and technology generally consists of the production, preservation and consumption of food.
Physics, as a scientific subject, helps to explain and understand the underlying physical and chemical processes that occur during the aforementioned processes. Without physics, we as food scientists/engineers wouldn't understand concepts such as heat transfer, rheology (study of food deformation), thermodynamics, transport phenomena and food spectroscopy.
In summary, physics plays an important role in food science and technology by helping to understand and control the physical and chemical processes that occur during food production, preservation, and consumption, which allows food scientists to make better quality and safe food products.