6. As someone walks, they produce a backward force which pushes against the ground. This causes a force from the ground because of...
- Momentum
- Friction
- Pull
- Velocity
- Push
7. As someone walks, what is exerted upon the person's foot?
- Weight
- Forwards
- Friction
- Upwards
- Downwards
8. A pair of opposite forces with the same force are called...
- The same
- Reaction pairs
- Momentum pairs
- Interaction pairs
- Opposite pairs
