Forces Objective: TSW Identify and describe the changes

Forces Objective:  TSW  Identify and describe the changes

Forces Objective: TSW Identify and describe the changes in position, direction, and speed of an object when acted upon by unbalanced forces. 6.8A What is a force? A force is a push or

pull Forces There are many different forces which act on objects. If forces are balanced the object doesnt move If forces are unbalanced the object will do one of the following things: Begin to move Stop moving Change direction Speed up

Slow down Balanced and Unbalanced Forces Forces occur in pairs and they can be either balanced or unbalanced Balanced Forces When two forces acting on an object

are equal in size, but are opposite in direction, we say the forces are balanced. Balanced forces do not cause a change in motion. Force Diagrams

We can show the forces acting on an object in a force diagram. In a force diagram, the force is shown with an arrow the larger the arrow, the bigger the force The arrows in a force diagram also show the direction that the force is acting on Sometimes, the arrow will be labeled with the size of the force in Newtons (N) Force Diagrams

Balanced Forces The ship is floating on the water, the forces are balanced. Which forces are acting on the ship? Gravity Because Gravity and Upthrust are equal the

(Waters) Upthrust ship stays afloat. Balanced Forces The vase is resting on the table. It is not moving, therefore the forces must be balanced. Which forces are acting on the vase?

Have a look around the classroom and name some of the balanced forces in action on different objects. Gravity Tables Unbalanced Forces

When two forces are acting on an object and are not equal in size, we say the forces are unbalanced. Unbalanced forces cause a change in motion by changing the

objects speed or Unbalanced Forces Air resistance is pushing upwards The man and the parachute are slowly falling to the ground.

Which forces are acting on the parachute? Gravity is pulling the man to the Which force is bigger? How can you tell? Gravity is the bigger force. We can tell this because the direction of movement of the

man and the parachute is the same as the direction of the force of gravity. Unbalanced Forces Air resistance is pushing upwards Gravity is pulling to the ground

The same forces are acting on the elephant, but without a parachute there is much less air resistance. Gravity is a much bigger force. Because there is a bigger difference between the force pulling downwards and the force pushing upwards, the elephant falls much more quickly than a

Unbalanced Forces The magnetic force is pulling the paperclip upwards The paperclip is jumping up to the magnet. Which forces are acting on the magnet? Which

is the greater force? Gravity is pulling the paperclip to The magnetic force is greater than the force of gravity therefore the paperclip moves in the direction of the

biggest force. Forces Each team is exerting a force what happens if the pulling force produced by each team is equal? What would happen if the team on the left were able to produce a bigger pulling force than the team on the right? Unbalanced Forces

Based on the forces shown: Which arm wrestler will likely win? Which direction will both arms move? Unbalanced Forces 4 N, left Which direction will the rope move? 10 N, right

Unbalanced Forces Which direction will the ball roll?

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