10. A boy exerted a 55 N at 33" with respect to the horizontal by pulling her sister in a wagon. (a) How much work is done if their distance covered is 22 meters? (b) How much distance is covered if the work done is 2000 J and the force exerted is still the same? Assume no friction acts on the wagon. Possible answers for (a): (a) - 1014.79 ) (c) 1014.79 J (b) - 1210.00 ] (d) 1210.00 J Possible answers for (b): (a) 0 meters (c) 108. 40 meters (b) 22.00 meters (d) 92253.76 meters 11. A roller coaster car descends a hill from Point A to Point B for 46 meters at an angle of 31.31" with respect to the horizontal. The roller coaster car has a mass of 918 kg. Neglect resistive forces. Determine the (a) net force acting upon the roller coaster car and the (b) the work done on the car by net force. (Clue: the angle between work and displacement is 0'.) Possible answers for (a): (a) ON (c) 8996.40 N (b) 7686.24 N (d) 42228.00 N Possible answers for (b): (a) 0J (c) 3.54 x 105 ] (b) 4.22 x 10* J (d) 4.14 x 105 J 12. Jay is pulling a wagon along the sidewalk with a kinetic energy of 11 Joules. Jay then applies a forward force of 33.10 Newtons for 2.03 meters. (a) How much work (b) What is the new kinetic energy of the wagon? Possible answers for (a): (a) oJ (c) 22.33 J (b) 16.31 ) (d) 67.19J Possible answers for (b): (a) 0J (c) 6.11 J (b) 78.19 J (d) 739.12 J