Please show the steps. Thank you

1. A 49.0 kg child sits on the top of a slide that is located 1.80 m above the 4 points ground. After her descent, the child reaches a velocity of 3.00 m/s at the bottom of the slide. Calculate how efficiently the potential energy is converted to kinetic energy. Round to the nearest tenth. O 74.5% O 25.5 % O 15.0 % O 32.6% O None of the aboveQuestion 2 Round all answers to the nearest tenth. 4 points A 1000kg roller coaster at a popular amusement park has a portion of the track that is similar to the diagram provided. Assuming that the roller coaster is frictionless, and the roller coaster is at rest at point A (a) Find the velocity of the roller coaster at point B (b) Determine total energy at point A and B A 9.5 m B 2 m O a) 13 m/s b) 93KJ O 31 m/s b) 18.62KJ O 12.1 m/s b) 186.2KJ O 12.1 m/s 93KJ O None of the aboveQuestion 1 6 points A man is pushing an 11 kg lawn mower against a frictional force of 86 N for 22 m. (5.4) (a) What is the minimal force that the man needs to push with in order to keep the lawnmower moving? (b) Calculate the minimum amount of energy required for the man to push the lawnmower the required distance. (c) If the man uses 2180 J of energy to push the mower at a constant speed what is his efficiency? ( a) 86 N b) 1892J c) 87 % O 82 N b) 1.892 J c) 13% O 28 N b) 2000 J c) 100 % O None of the aboveQuestion 2 (Round all answers to the nearest tenth 2 points A compact fluorescent bulb is 17.0 % efficient. (5.4) (a) How much energy input would be required for the bulb to produce 252 J of light energy? (b) What type of energy is the waste output and how much would be created? ( a) 1.4824 J b) 1.2304 J Waste Energy a) 1.465 J b) 1.265 J Nuclear Energy a) 1482.4 J b) 1230.4 J Thermal Energy O None of the above