Forces and Changes in Motion Education Presentation in Hand Drawn Lightly Textured Style (1).pptx

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1. Understanding Acceleration in Physics vs. Everyday Life

2. Raise your hand when you have answers, questions, or clarifications to be recognize; listen when someone is talking; and respect each and every one. Classroom rules:

3. In a position-time graph, a straight diagonal line indicates that the object is moving with: a.Constant acceleration b.Constant velocity Multiple Choice

4. What does a horizontal line on a velocity-time graph represent? a.The object is at rest b.The object is moving with constant velocity Multiple Choice

5. How does a position-time graph look for an object with constant acceleration? a.A curved (parabolic) line b.A zigzag line Multiple Choice

6. Which of the following describes the velocity-time graph for an object with constant acceleration? a. A horizontal line b.A diagonal line Multiple Choice

7. 1. If an object's velocity-time graph is a straight-line sloping downward, what does it indicate? a.The object is slowing down b.The object is at rest Multiple Choice

8. Learning objectives: By the end of the lesson, students should be able to: Define acceleration in physics and differentiate it from everyday usage. Identify situations where an object is accelerating (speeding up, slowing down, or changing direction). Apply the concept of acceleration to real-life scenarios.

9. A crate on a surface

10. Scenario 1: A car speeding up after a red light. Scenario 2: A car slowing down at a stop sign. Scenario 3: A car turning a corner at constant speed.

11. Activity: "Ball Acceleration Test"

12. Instructions: Get a small ball from your teacher. Roll the ball on a flat surface at a steady speed. Push the ball gently to make it move faster. Slow the ball down by applying a little force. Change the ball’s direction by pushing it sideways. Observe what happens to the speed and movement of the ball.

13. Definition: Acceleration is a change in velocity (speed or direction).

14. Three types of acceleration: Speeding up (positive acceleration). Slowing down (negative acceleration or deceleration). Changing direction (even at constant speed).

15. A car goes from 10 m/s to 30 m/s in 5 seconds. Find its acceleration.

16. A bicycle starts from rest and reaches a velocity of 20 m/s in 10 seconds. What is its acceleration?

17. Activity: "Acceleration in Action"

18. A character in a novel rushing to escape danger

19. A pendulum swinging at a steady rhythm

20. A poet writing while sitting at a desk

21. A poet writing while sitting at a desk

22. Try This! What are the forces acting on the objects shown, and how would their force diagrams appear? A ball floating in the water A ball hanging from a rope Upthrust of the water Weight of the ball Pull of the rope Weight of the ball ANSWER KEY

23. Balanced Forces Forces are balanced when two forces acting on an object are of the same size and act in opposite directions. In this scenario, the resultant force is zero. The resultant force is the overall force acting on an object when two or more forces are combined. Weight of the books (15 N) Reaction force of the surface (15 N)

24. Balanced Forces When balanced forces act on an object at rest, it remains stationary. When balanced forces act on a moving object, it moves at a constant speed in the same direction. Weight of the books (15 N) Reaction force of the surface (15 N) Thrust (2,000 N) Drag (2,000 N)

25. Learning Check Determine whether each statement is TRUE or FALSE. If false, suggest an alternative statement to make it correct. If an object is stationary, no forces are pushing or pulling it. If an object is moving, a force must be acting on it. 1 2

26. Learning Check If an object is stationary, no forces are pushing or pulling it. An object at rest usually has many forces acting on it, including gravity and air resistance (or drag) and the upward force of the surface the object is sitting on. If an object is moving, no force is necessary to keep it moving, but a force is needed to make it stop or change direction. If an object is moving, a force must be acting on it. 1 2 ANSWER KEY FALSE FALSE

27. Unbalanced Forces We can say that forces are unbalanced when two (or more) forces acting on an object are not equal in size. This means that the resultant force is no longer zero. Unbalanced forces cause changes in the motion of an object. Pushing force (200 N) Box starts moving to the right Friction (100 N)

28. Unbalanced Forces Unbalanced forces cause a stationary object to move. Unbalanced forces can speed up or slow down an object. They can also change the direction of a moving object. Pushing force (500 N) Crate starts moving to the right Car speeds up to the right Friction (300 N) Thrust (3,000 N) Drag (1,000 N)

29. Unbalanced Forces The change in motion of a moving object depends on the direction of the resultant force. Resultant force = 3,000 N + (-1,000 N) = 2,000 N Resultant force = 1,000 N + (-2,000 N) = -1,000 N 1,000 N 2,000 N 3,000 N 1,000 N The truck speeds up to the right The truck slows down

30. TUG OF WAR RIDING THE SKATEBOARD Forces Around Us Winning the tug of war requires an unbalanced force. The team that exerts the larger force wins. To initiate movement or increase speed on a skateboard, an unbalanced force is generated by pushing against the ground with your foot.

31. Learning Check You kick a stationary soccer ball, and it starts rolling forward. Then, it hits a muddy area and slows down until it stops. Why did the ball stop when it hit the mud?

32. Learning Check The ball stops because the mud creates friction—a force that acts opposite to the direction the ball is moving. The forces on the ball are unbalanced, causing the motion of the object to change. ANSWER KEY

33. When forces acting on an object are not the same size, it indicates that the forces are unbalanced , potentially leading to changes in the object's motion. A force is a push or a pull resulting from the interaction between forces. Force diagrams can represent these forces. Summary Forces are considered balanced when they are the same size and act in opposite directions.

34. Observe and write about at least three real-world scenarios where you see these principles of force and motion at play. How do the direction and size of forces affect the motion of objects? Create a poster in Canva to present your observations. Assignment

35. Use these icons and illustrations in your Canva Presentation. Happy designing! Don't forget to delete this page before presenting. Resource Page set:nAE-NRy-MWA set:nAFTe-Z4vGc

36. Try this background for online class. *Please delete this section before downloading.

37. B C O D M U Q 0-9 for bubbles for a drumroll for unveil for blur for confetti for mic drop for quiet Any number from 0-9 for a timer Press these keys while on Present mode!