[单选题]
07.11: A cart is initially moving at7pr( h.:y wdkf 0.eccbi2;1e ii-5 m/s along a track. The cart comes to rest after traveling 1 m. The experiment is repeated on the same track, but now the cart is initially moving at 1 m/s. How far does the cart travel b1ieei2ic -cb ;efore coming to rest?