[填空题]
The CM of an empty 1050-kg car is 2 lt4m+kh()j :csmb ju..5fxuv; n d bad:f(*1q1u0 m behind the front of the car. How far from the front of the car will the CM be when two people sit in the front seat 2.80 m from the front of the car, and three people sit in tfb:d(u1nu ; q1avxd *fhe back seat 3.90 m from the front? Assume that each person has a mass of 70.0 kg. m
