Answer:

1.Running mainly uses sagittal movements as the arms and legs move forwards. However, there is also a rotational component as the joints of the leg lock to support the body weight on each side. There is also an element of counter pelvic rotation as the chest moves forward on the opposite side.

2.Whenever people walk, their foot exerts a force on the ground. The ground then exerts an equal force which points in the opposite direction. It is this force (force due to friction) that allows the person to move forward.

3. Isaac Newton's first law of motion states that an object at rest tends to stay at rest, while an object in motion tends to stay in motion unless an external force acts upon it.

4. sorry cant answer this one

5. Newton's Third Law of Motion states that for every action, there is an equal and opposite reaction. Thus, swimmers must stroke downward in the water to stay afloat and propel forward.