Energy Types and Transformations

The video tutorial covers the concepts of work and energy, focusing on potential energy, its definition, and examples. It explains the derivation of the potential energy formula and provides a practical example calculation. The tutorial also explores energy transformation processes and the law of conservation of energy, emphasizing that energy can neither be created nor destroyed but only transformed from one form to another.

What is the term for energy stored in an object due to its position or state?

• Chemical energy

• Potential energy

• Thermal energy

• Kinetic energy

In the chalk activity, what factors affect the potential energy of the chalk?

• Neither mass nor height

• Both mass and height

• Only the height from which it is dropped

• Only the mass of the chalk

What is the formula for calculating potential energy?

• PE = mg/v

• PE = Fd

• PE = 1/2 mv^2

• PE = mgh

If two observers are at different heights, how will the potential energy of an object on a table appear to them?

• The same for both

• Different for each

• Zero for both

• Infinite for both

Which type of energy transformation occurs in a fan running on electricity?

• Electrical to thermal

• Electrical to mechanical

• Mechanical to electrical

• Chemical to electrical

Which device converts mechanical energy into electrical energy?

• Microphone

• Generator

• Loudspeaker

• Heater

What type of energy transformation occurs during photosynthesis?

• Mechanical to electrical

• Chemical to light

• Electrical to mechanical

• Light to chemical

Which of the following is an example of energy transformation in a loudspeaker?

• Chemical to light

• Mechanical to thermal

• Electrical to sound

• Sound to electrical

What does the law of conservation of energy state?

• Energy can neither be created nor destroyed

• Energy can only be destroyed

• Energy can only be created

• Energy can be created and destroyed

In the pendulum activity, what happens to the energy of the swinging pendulum?

• It is converted to sound energy

• It remains constant in the same pendulum

• It is transferred to the other pendulum

• It is lost to the environment