Balanced and Unbalaned Forces

Forces that cause a change in motion.

What forces are changing your motion as you skydive? http://www.youtube.com/watch?v=oaMTSOI1Zk4 What forces are changing your motion as you skydive? What force is speeding you up? What force slowing you down? Are both forces acting on the sky divers at the same time?

When there is a combination of forces acting on an object this is called a _________ ___________. The ___________ ____________ determines the change in the objects motion. (If it speeds up or slows down) From the forces shown what do you predict will happen to the sky divers speed? _____________________________________________________________________

How do you find the net force? If the forces are in the same direction you add them together. _______ N

How do you find the net force? If the forces are in opposite directions you subtract the forces. 30 N 10 N ____ N

The forces acting on the object can be balanced or unbalanced If they are unbalanced their will a change in the objects motion. How will this objects speed change? ____________________________________________________________________ Find the Net force acting on the object. 10 N 5 N

The forces acting on the object can be balanced or unbalanced If they are balanced their will NOT be any changes in the objects motion. Explain how this object motion will not change. ____________________________________________________________________ Find the Net force acting on the object. 10N 10 N

Find the Net force acting on the object. ________________ Are the forces balanced or unbalanced? What will happen to the speed of the object? ____________________________________________________________ How do you know this? ____________________________________________________________ 10 N 12 N