Weegy: Gravity is considered a CONSERVATIVE force. User: When gases, liquids, or solids are in contact with a moving object, the flow of _____ occurs due to frictional forces. heat current electricity radiation Weegy: When gases, liquids, or solids are in contact with a moving object, the flow of HEAT occurs due to frictional forces. User: Thermal energy produced by friction cannot usually be used to do work. True False Weegy: Thermal energy produced by friction cannot usually be used to do work. TRUE. User: A generator converts _____ energy into _____ energy. mechanical; chemical mechanical; electrical electrical; mechanical chemical; mechanical (More)