Problem 1 Joanna and her btother are skiing together in a 5" ski zone while Joanna is holding the end of a rope tied to her brother. They are both moving at a velocity of 7.20kph on a sloping portion...

Please answer letters A,B,C of the given problem. Please show clear and complete solutions thank you


Extracted text: Problem 1 Joanna and her btother are skiing together in a 5" ski zone while Joanna is holding the end of a rope tied to her brother. They are both moving at a velocity of 7.20kph on a sloping portion of the ski slope. Joanna notices that they are approaching a steep ski slope. She then pulls the rope with an average force of 7 Newtons. If the angle of the rope will not change at 20 from the horizontal, and the coefficient of kinetic friction between her brother and the ground is 0.10, determine (a) the time required for her brother's speed to be cut in half, and (b) the distance traveled in this time. Also, her brother weighs 196.2 N. What is the brother's acceleration with respect to the ski zone's axis at the moment she pulled the rope? A. -0.391 m/s*2 -0.611 m/s 2 0.231 m/s 2 0.451 m/s 2 Determine the time required for her brother's speed to be cut in half. * 2.558 s B. 1.513 s 4.329 s 2.217 s Determine the distance traveled at the time her brother's speed is cut in half. * 4.432 m C. 3.326 m 3.64 m 2.51 m