C} Question 7 D Question 8 1 pts A mass 7.141769 has an initial speed up the incline of 28.23m/s at the base of an inclined plane. The plane is inclined at an angle of 19652" to the horizontal and is frictionless. When the mass comes momentarily to rest, what has been the change in its potential energy {in J}? 1 pts A 17.9kg mass is moving down a rough inclined plane with an initial speed on. The incline has a coefcient of kinetic friction of 0.55 and is inclined at an angle 29 to the horizontal. The mass moves a distance of 9.21m along the plane before coming to a stop. Determine the work done by friction {in J]. Question 9 1 pts An ideal spring has a force constant 8,207.7N/m. If 15.07J of work are done while compressing the spring, how much has the spring been compressed (in cm)? Question 10 1 pts Two masses on 225.3%! and m2 25.5369 are moving on a horizontal frictionless surface. Mass m1 has velocity 91 223.44 %. Mass 7112 has velocity 1);; 284.9% %. The two masses collide in a perfect elastic collision. Determine the change In momentum of mg during this col|I5Ion {In % )? Question 11 1 pts Two masses m] :5_5kg and m2 :1.8kg are moving on a horizontal frictionless surface. Mass 7111 has velocity 1;] 25.92; % Mass 1112 has velocity 92 2-11.23; %. The two masses collide in a completely inelastic collision {they stick together). Determine the change in kinetic energy of mg during this collision (in J J? Question 12 1 pts A mass 669 is moving with an initial velocity of 59.5% % A force 24iN acts on the mass for a time of 113.5ms. What is the magnitude of the nal momentum of mass (in him )? Question 13 1 pts A 1,296kg car is on a circular track of radius 88m that is banked at an angle of 12.6130 to the horizontal. If the track is frictionless, what is the speed for the car go around the track without slipping (in fem/hr}. Question 14 1 pts Asatellite orbits earth at a distance of 349km above the surface of the earth. The radius of the earth is R5 = 6357km. The mass of the earth is ME = 5.97 X 1024169. The gravitational H r 2 constant is G = 6.67 X %. Determine the acceleration due to gravity at the orbit of the satellite {in E2 ). 5