Balanced and Unbalanced Forces 91418 https www youtube

Balanced and Unbalanced Forces 9/14/18 https: //www. youtube. com/watch? v=QMp. YOW 8 fpl 8

What is a FORCE? A force is a push or pull that can cause motion (speed up, slow down, stop, move, or change direction) Force is measured in Newtons (N) Force is measured using a spring scale https: //www. youtube. com/watch? v=B 6 mi 1 -Yo. RT 4

2 Common Forces Gravity: force of attraction between two objects, Earth’s gravity pulls on all objects Friction: a force that resists motion between two surfaces that are pressed together Net Force – The overall force

Balanced Force Equal forces in opposite directions produce no motion

Balanced Forces � When forces are balanced there is either: 1. No motion Ex: stopped car at a stop sign 2. Constant Motion Ex: setting your car on cruise control Object is already moving

Balanced Forces Balanced forces do not cause a change in motion. The forces are equal. 10 N – 10 N = 0 N

Unbalanced Forces Unequal opposing forces produce an unbalanced force causing motion

Unbalanced Forces When forces are unbalanced there is a change in motion. 1. Moving in same direction add forces together to get the net force. 2. Moving in opposite directions subtract the forces to get the net force.

Unbalanced Forces 10 N The forces are NOT equal. 20 N – 10 N = 10 N 8 N 6 N 8 N + 6 N = 14 N

Unbalanced Forces 3 N, right – 6 N, left = 3 N, left

Unbalanced Forces 4 N, left – 10 N, right = 6 N, right https: //www. youtube. com/watch? v=L_TXu 8 ih 668

Unbalanced Forces 5 N, right + 10 N, right = 15 N, right

Net Force -The overall Force acting on an object Expressed in Newtons (N) https: //www. youtube. com/watch? v=q. Qi 667 U_Mig

NET FORCE Add (Right) = Add (Left) = Help each other Going same direction ▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬ Subtract = Oppose each other Go against

LET’S PRACTICE! https: //www. youtube. com/watch? v=Ywp. T 0 ZBxcys

Balanced vs Unbalanced On the earthquake Releasing energy of the Fault line U 2 Women lifting a box into the back of a truck A moon that orbits A planets B 2 people pulling opposite directions on a rope with the same amount of force A skier going Down a mountain U A book sitting high on A bookshelf U B B

Calculating NET FORCE Net Force= 50 N Net Force= 17 N Net Force= 40 N Net Force= 50 N