The tolerance is -+1 in the 2nd significant digit.

A cart with mass 440 g moving on a frictionless linear air track at an initial speed of 0.89 m/s undergoes an elastic collision with an initially stationary cart of unknown mass. After the collision, the first cart continues in its original direction at 0.39 m/s. (a) What is the mass of the second cart? (b) What is its speed after impact? (c) What is the speed of the two-cart center of mass? (a) Number Units (b) Number i Units (c) Number i Units