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

Suppose that the carriage's actual speed at point D was 15 m/s (or 54 km/h).Calculate its kinetic energy in joules

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.

Calculating the potential and kinetic energy of the carriage at point B:gravitational potential energy, Ep = mgh                                                            = 500 kg x 9.8 m/s2 x 30 m                                                            = 147,000 J kinetic energy, Ek = ½mv2                                = ½ x 500 kg x (24.25 m/s)2                                = 147,000 JQuestion 5SavedUse the equations to calculate, for point A, the carriage's:gravitational potential energykinetic energy

A 1690 kg car travels at a speed of 13.5 m/s. What is its kinetic energy? Assume that air resistance is negligible.

Sheila takes Josie, her niece, to the park to play on the slides. Josie starts from rest atop a 4.01-meter high slide. She is moving at 7.31 m/s when she reaches the bottom. What percentage of her total mechanical energy at the top of the slide is dissipated to heat as a result of friction?