A trolley of mass 20kg was originally at rest on a smooth horizontal surface. By how much will it accelerate if a pulling force of 22 N is applied on it horizonA trolley of mass 20kg was originally at rest on a smooth horizontal surface. By how much will it accelerate if a pulling force of 22 N is applied on it horizontally?​

At 20∘c, the hole in an aluminum ring is 2.800 cm in diameter. you need to slip this ring over a steel shaft that has a room-temperature diameter of 2.804 cm . 1. to what common temperature should the ring and the shaft be heated so that the ring will just fit onto the shaft? coefficients of linear thermal expansion of steel and aluminum are 12×10−6 k−1 and23×10−6 k−1 respectively.