Understanding Force Diagrams and Balanced/Unbalanced Forces
Explore the concepts of force diagrams, balanced forces, and unbalanced forces through visual examples and explanations. Learn how balanced forces keep objects stationary or at a constant speed, while unbalanced forces cause movement and changes in direction. Practice calculating resultant forces and understand the effects of different force interactions. Engage in practical activities such as drawing force diagrams and completing worksheets to deepen your understanding of forces in action.
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Presentation Transcript
Forces We know that a force can be a push or a pull acting on an object There is a good chance that 2 forces can be acting on an object at any one time Examples: Lifting something Dragging something Floating Globe
Balanced Forces If two equal forces are applied to an object in opposite directions, the object does not move / or moves as a constant speed. This is called balanced forces.
Unbalanced forces If two unequal forces are applied to an object in opposite directions, the object does move. This is called unbalanced forces. And someone will win!!
Unbalanced Forces If the forces acting on an object are not balanced then the object with either: Speed up Slow down Change direction Chance its shape Fill in the Gaps sheet
We can use force diagrams to show this: 4N 7N The block has 2 opposing forces being applied to it: 7N to the right and 4N to the left. They are Unbalanced Forces. To Calculate the Resultant Force (Fr), subtract one from the other: 7N 4N = 3N to the right 3N
Problem: A man of mass 75kg has a weight of 750N. This 750N will act downward on the table and the table will exert a 750N force upwards on the man. The forces are balanced. Force down 750N What would happen if the upward force were less than 750N? Force up 750N
Your go: Collect Sheet: Drawing Force diagrams, fill in sheet finding Fr Do Q6 p103 of text book Lets have a tug of war!!
More on Balanced and Unbalanced Forces: Collect and complete the following worksheets: More on Balanced and Unbalanced forces Floating and Sinking (Read p101) Parachutes (Read p101) Extension Work: Text book: Starting Science for Scotland Book 2, Read p22, Ans Q1-4 Base Jumping
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