1.9 describe the effects of forces between bodies such as changes in speed, shape or direction

FORCES WITH CHANGES OF SPEED:

- If an object accelerates, weight and the surface of what the object is on's reaction are in place, but also drag and thrust but as the object is accelerating the thrust overpowers drag and hence moves forward.
- A stationary object has weight and the surface of what the object is on's reaction - however these forces are equal and so are balanced.
- When an object moves a constant speed, weight, surface's reaction, thrust and drag are taking place but all forces are equal so the speed doesn't change.
- A decelerating object doesn't move on a Y axis as weight and the surface's reaction are equal but the object decelerates since drag overpowers thrust and thus slows it down.

FORCES WITH CHANGES OF SHAPES:

- The shape of an object effects momentum, using the formula force = change in momentum / time taken

FORCE WITH CHANGES OF DIRECTION:

- The greatest force or the resultant force determines which direction the object will travel to.