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6. As someone walks, they produce a backward force which pushes against the ground. This causes a force from the ground because of...

  • Pull
  • Push
  • Friction
  • Momentum
  • Velocity

7. As someone walks, what is exerted upon the person's foot?

  • Weight
  • Friction
  • Upwards
  • Forwards
  • Downwards

8. A pair of opposite forces with the same force are called...

  • The same
  • Reaction pairs
  • Interaction pairs
  • Opposite pairs
  • Momentum pairs