Three forces act on an object. if the object is in translational equilibrium, which of the following must be true? i. the vector sum of the three forces must equal zero; ii. the magnitude of the three forces must be equal; iii. the three forces must be parallel.

Use the table to answer question 22 23 and 24.

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.

Anika asks eva to roll a basketball and then a bowling ball to her. which requires more force to roll, and why?