When you walk, you push against the floor, and _________.
A. The floor needs to be frictionless.
B. The floor pushes back against you.
C. The floor doubles your momentum.
D. Your shoes store momentum.

Respuesta :

When you walk, you push against the floor, and the floor pushes back against you.

Answer: B. The floor pushes back agaisnt you. 

Good luck with your studies, I hope this helps~!