10 An object that weighs 1150 N rests on a lever at a point 0.390 m from a support. On the same side of the support, at a distance of 3.00 m from it, an upward force with magnitude Fis applied. Ignore the weight of the board itself. If the system is in equilibrium, what is F? Express your answer in Newtons. 1.56 points -3.00 m eBook Hint PN Print References x m where P = 1150 and x = 0.390. 14 A solid cylinder (mass 0.224 kg, radius 2.00 cm) rolls without slipping at a speed of 5.00 cm/s. What is its total kinetic energy? 11 56 A turntable must spin at 33.3 rev/min (3.49 rad/s) to play an old-fashioned vinyl record. How much torque must the motor deliver if the and mass 0.280 kq. turntable is to reach its final angular speed in 2.40 revolutions, starting from rest? The turntable is a uniform disk of diameter 30.5 cm N.m e Book Print Book Print erences 15 12 A uniform disk o s of 0.100 m and spins with a frequency of 0.550 rev/s. What is its angular momentum? Four masses are arranged as shown. They are connected by rigid, massless rods of lengths 0.770 m and 0.500 m. What torque must be applied to cause an angular acceleration of 0.750 rad/s about the axis shown? kg. m2/s 1.56 56 -B A 4.00 kg Axis - B 3.00 kg C5.00 kg PhotoGrid OD D 2.00 kg -10.500 m- where L = 0.770 . References N.m 16 13 A skater is initially spinning at a rate of 18.0 rad/s with a rotational inertia of 3.20 kg.m when her arms are extended. What is her ofastole wheel, of radius 0.300 m and mass 1.80 kg (concentrated on the rim), is rotating at 4.00 revis. After 58.2 s the wheel comes s the magnitude of the average torque due to frictional forces? angular velocity after she pulls her arms in and reduces her rotational inertia to 1.60 kg.m?? N.m rad/s e Book References