Unit 2 - Energy Flashcards
What happens to the heat energy generated when an object brakes to a halt?
It warms up the surroundings.
Describe the changes in energy that occur when a person travels down a belter skelter.
Gravitational potential energy is transformed into kinetic energy.Some kinetic energy is transformed into heat energy due to friction.
Why does a cyclist not reach as high a speed as calculated when they go down a hill?
Work is done (energy transferred) against friction/air resistance as heat energy due to friction is released into the surroundings.
What is the energy change that takes place when a car brakes to come to a stop?
Kinetic energy is transformed into heat energy (due to friction)
Give 2 factors affecting the size of kinetic energy an object has.
Velocity and mass.
What type of energy does a snowboarder on a ski lift gain?
Gravitational potential energy
What is the unit for energy?
Joule - capital J.
