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What is the law of conservation of energy?
Energy cannot be created or destroyed, only transformed or transferred.
How does energy conservation apply to a falling object?
The potential energy is converted to kinetic energy.
What happens to energy in a frictional force?
Some energy is lost as heat, reducing the mechanical energy.
How can energy be conserved in a car engine?
By reducing friction, using efficient materials, and transferring energy more efficiently.
How is energy conserved when you stop a car?
Kinetic energy is converted to thermal energy due to friction in the brakes.
How does energy conservation apply to a rollercoaster?
Potential energy at the top is converted to kinetic energy as it descends.
How does energy transfer during a bouncing ball?
Kinetic energy is converted to potential energy at the highest point, and vice versa.
What is an energy chain?
The sequence of energy transfers between different stores.
Why is it impossible to achieve 100% efficiency in machines?
Some energy is always lost as heat due to friction and other inefficiencies.
How does a battery-powered device conserve energy?
Electrical energy from the battery is converted into other forms of energy, like light or sound.
