A large block of mass 5 \mathrm{~kg} is moving to the right at a velocity of 10 \mathrm{~m} / \mathrm{s}. Spaced out every meter are smaller, initially stationary blocks of mass 1 \mathrm{~kg}. All collisions are perfectly inelastic. Neglecting friction, how far will the large block travel before its velocity has decreased to below 3 \mathrm{~m} / \mathrm{s} ?
Answer Choices
A. 5 \mathrm{~m}
B. 8 \mathrm{~m}
C. 12 \mathrm{~m}
D. 17 \mathrm{~m}
E. 50 \mathrm{~m}