I NEED HELP DUE TODAY PLEASE ITS LAB REPORT SOME WILL NOT GET IT ITS DUE TODAY A "Law of Conservation of Energy Lab Report"

Identify the type of synthetic material used in each object

Which explanation describes the forces involved for a person to walk down the sidewalk? a. the person's feet push backward on the sidewalk; the sidewalk pushes backward on the person. b. the person's feet push forward on the sidewalk; the sidewalk does not push on the person. c. the person's feet push backward on the sidewalk; the sidewalk pushes forward on the person. d. the person's feet push forward on the sidewalk; the sidewalk pushes forward on the person.

1. a net force of 100 newton’s is applied to a wagon for 5 seconds. this causes the wagon to undergo a change in momentum of