Question

pls do #9

tension 7) A cord with a tension of 49 N pulls a mass of 5.0 kg up a hill as shown. The coefficient of kinetic friction between the mass and the hill is 0.20. The tension force is parallel to the hill. If the mass moves 1.5 m along the hill, please determine the work done by the forces below. Work Space: Work Done Force Gravity Tension Friction Normal Energy (1) 8) A 0.055 kg mass moves along the x axis, oscillating in the potential energy "well" shown at the right. The total energy of the mass is E = 30.0J. a) Estimate the location of the turning points for this mass. b) Determine the speed of the mass when it is at x = 5.0 m. 2 4 6 8 10 12 (m) c) Calculate the force that acts on the mass at x = 8.0 m. 9) Let's redo multiple choice 10, but this time let's through in friction. The coefficient of kinetic friction is 0.40. A small mass m=1.0 kg is pressed against a spring, as shown. The mass is the little gray box. The spring is compressed 0.400 m to the left of its relaxed position. The elastic constant of the spring is 50.0 N/m. The mass is released from rest and the spring accelerates the mass to the right. When the mass gets to x=0, how fast will it be moving? 0.40 m 2-0

Answer 1

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