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QUESTION 11 A car picks up speed from rest at a constant useful engine power, i.e. the cost of energy for friction and overcoming drag is neglected. Constant power is spent only on increasing the kinetic energy of the car. O 3MV3 If the achieved speed V, the mass of the machine M and the distance traveled D are known, express the car power in terms of these parameters. 2D O MV3 2D O MV 3 D O 2MV 3 D O MV3 3D O 2MV 3 3D 4MV3 D O MV3 4D O 3MV 3 D O MV3 DQUESTION 7 The masses of the Atwood machine with a massless pulley and massles cord have an acceleration a1 = 9/6, where g is the gravity acceleration. No friction. If a large mass is increased 5 times, then the acceleration of the masses would be a2 = g / k. Find K. Input your answer using 5 significant figures. m m2 m28 QUESTION 8 x=x +vi+-at2 x = 51.5 m x = 22.7 m 1= 8.51 s a = 9.82 m/s2 = ? in m/s Input answer using 3 significant figures.QUESTION 9 Two different point masses have different known speeds: 1.00 m/s and 9.00 m/s, but the same unknown kinetic energy. If these two masses are coupled at one point and, moving together, have together the above kinetic energy, then what is the speed of this couple? Input your answer in m/s using 3 significant figures. QUESTION 10 A body of mass 6.76 kg is moving toward X direction with the velocity V = (a-bt) (c-dt), where t is the time, a=0.357(m/s) 1/2,b=0.317m1/2s-3/2,c=5.16m1/2s-1/2, and d=0.126m1/2s-3/2 are constants. At the time t = t =1.37s the coordinate X of the body is X =1.46m. What is the kinetic energy of the body when the time is t,=3.79s? Input your answer in J using 3 significant figures