Energy

Question 1

describe the changes in energy that occur when a person travels down a helter skelter

Answer 1

gravitational potential energy is transformed into kinetic energy. Some kinetic energy is transformed into heat energy due to friction

Question 2

why does a cyclist not reach as high a speed as calculated when they go down a hill

Answer 2

work is done against direction/air resistance as heat energy due to friction is released into the surroundings

Question 3

what is the energy change that takes place when a car brakes to a stop

Answer 3

kinetic energy is transformed into heat energy

Question 4

2 factors affecting the size of kinetic energy an object has

Answer 4

velocity

mass

Question 5

what type of energy does a snowboarder on a ski lift gain

Answer 5

gravitational potential energy

Question 6

what happens to heat energy generated when an object brakes to a halt

Answer 6

it warms up the surroundings