A force F=30 N is pushing a box of 4 kg with constant speed, up along an incline with an angle of 30 degree, if the angle changes to 20 degree, calculate the acceleration. A block of mass 5.00 kg rests on a horizontal surface where the coefficient of kinetic friction between the two is 0.200. A string attached to the block is pulled horizontally, resulting in a 2.00- m/s acceleration by the block. Find the tension in the string