Energy Transformations in Mechanical Systems

The video tutorial explains the conversion of different types of energy. It starts with chemical potential energy being converted into mechanical energy in a bike wheel. As the bike moves, some energy is lost as thermal energy due to friction. The tutorial then demonstrates how mechanical energy is converted into electrical energy, emphasizing the need for energy input to maintain motion. Finally, it discusses the release of thermal energy and the transformation of electrical energy into heat.

What type of energy is initially added to the person?

• Thermal energy

• Chemical potential energy

• Mechanical energy

• Electrical energy

What happens to some of the mechanical energy of the bike wheel?

• It remains as mechanical energy

• It is stored as chemical energy

• It is lost as thermal energy due to friction

• It is converted directly to electrical energy

How is mechanical energy converted in the second section?

• Into potential energy

• Into chemical energy

• Into thermal energy

• Into electrical energy

What effect does increasing the speed have on the person?

• It makes the person tired

• It makes the person less hungry

• It has no effect on the person

• It makes the person more hungry

What transformation occurs when boiling temperatures are reached?

• Chemical energy to mechanical energy

• Thermal energy to electrical energy

• Electrical energy to thermal energy

• Mechanical energy to chemical energy