On a roller coaster, energy is transferred between GPE and KE stores of energy.Have a think about the energy stores of the car as it travels down.What is happening to its speed?The speed remains constant.The speed is decreasing.The speed is increasing.

13) If the roller coaster car in question 12 were moving with twice the speed, then what would be its new kinetic energy?

Which of the following statements is true about a rollercoaster car travelling down the track?The store of GPE is increasing and the store of KE is decreasing.The store of GPE is decreasing and the store of KE is decreasing.The store of GPE is increasing and the store of KE is increasing.The store of GPE is decreasing and the store of KE is increasing.

A diagram of a roller-coaster track is shown below. Select the position on the track at which a roller-coaster car has the most gravitational potential energy.

Question 9Summarise the law of conservation of energy in your own words.Question 10Suppose that the carriage's actual speed at point D was 15 m/s (or 54 km/h).Calculate its kinetic energy in joules.Calculate the percentage of its starting energy that has been converted into thermal and sound energy.Question 11 Key QuestionAs a roller coaster carriage speeds down a slope, it loses gravitational potential energy.Explain why this does not violate the law of conservation of energy.

As a roller coaster carriage speeds down a slope, it loses gravitational potential energy.Explain why this does not violate the law of conservation of energy.