a uniform cylinder of radius r and mass m rests on a horizontal plank. the plank slides horizontally with acceleration a. if the cylinder rolls without slipping, what is its acceleration relative to the plank and the ground?

Calculate the first and second velocities of the car with four washers attached to the pulley, using the formulas v1 = 0.25 m / t1 , and v2 = 0.25 m / (t2 – t1) where t1 and t2 are the average times the car took to reach the 0.25 and the 0.50 meter marks. record these velocities, to two decimal places, in table e.