A)a train accelerates from rest to 160 km per hour in 1.5 minutes along a straight track and the acceleration is constant during this period. if the angular acceleration of the wheels has a magnitude of 1.0 rad s-2, how far above the track are the the axles of the wheels? b)a flywheel of moment of inertia 2.0 x 102 kg m2 comes to rest from an initial angular speed of 15 revolutions per second in 30 seconds. assuming that the angular speed of the flywheel decreases at a constant rate, and that the only cause of the slowing down is friction from the shaft of the flywheel, calculate the magnitude of the frictional torque at the shaft. c)a uniform horizontal plank of mass 20 kg and length 6.0 m projects 2.2 m over the edge of a pirate galleon. the unfortunate jack tar of mass 60 kg is forced to walk along the plank. pirates hold the plank to stop it falling back into the ship but gradually release their hold as jack moves along the plank. the pirates let go of the plank just as jack is precariously balanced on it: one step further and he will fall. how far from the edge of the ship is jack at this moment? d)each of the wheels of a certain four-wheel drive vehicle has a moment of inertia about its axle of 2.7 kg m2. the vehicle is lifted on a ramp such that the wheels can rotate freely. the wheels are turning at 5.0 revolutions per second when the brakes are applied. how much energy is dissipated by friction in bringing all the wheels to rest?