MOTION. SPEED. DISTANCE. VELOCITY. DISPLACEMENT. ACCELERATION
- 1. LET’S GET INTO MOTION Pertains to the length travelled by an object. N C E D S I T A A quantity described by both magnitude and direction. O R T E V C
- 2. Shortest distance between initial and final position. S D I N T M P A L C E Tells you how fast and in which direction an object moves. I Y T V E C L O
- 3. Tells you how fast a certain objects move D E E P S A change in position with respect to a reference point N O I T O M
- 4. Rate at which velocity changes A L R E C A I N O C E T A quantity that includes a number and a unit only and described by magnitude alone. C L S A R A
- 6. Learning Goal Describe the motion of an object in terms of distance or displacement, speed or velocity, and acceleration
- 8. FORCE
- 9. FORCE AND MOTION Force is a push or a pull exerted by one body to another body; the effect of which is to tend to change or change the state of motion, change of size or shape of the body on which it acts
- 10. Motion Scalar and Vector Quantity Distance and Displacement Speed and Velocity Acceleration
- 11. Differentiate Scalar and Vector Quantity Distance and Displacement Speed and Velocity
- 12. Scalar and Vector Quantity SCALAR – a quantity represented only by its magnitude VECTOR – a quantity represented not just by its magnitude, but also its direction
- 14. Distance and Displacement Distance – is a scalar quantity which refers to “how much ground an object has covered” (length) during its motion. Displacement – is a vector quantity which refers to “how far out of place an object is”, it is the object’s change in position (direction)
- 15. EXAMPLE: A motorcycle is moving along a horizontal straight line. The motorcycle moves from rest to 40 meters to the right of the starting point. We can say this: 1. The motorcycle has covered 40 meters, so the total distance is 40m. 2. The motorcycle changed its position 40m to the right of the origin. Its total displacement is 40m to the right.
- 16. EXAMPLE: If the motorcycle moves from 40m to 70m This means that: 1. The motorcycle has covered an additional 30m. The total distance is 40m + 30m = 70m 2. The motorcycle changed its position 30m to the right of the origin. Its total displacement is 40m + 30m= 70m to the right.
- 17. Calculating the speed and velocity
- 18. Speed and Velocity •SPEED - A measure of how fast or slow an object travels or the rate at which an object changes its distance. •VELOCITY – is the time rate of change of position or displacement
- 20. PRACTICE DRILL 1.Caleb rides his horse 60 m in 5 s. What is his average speed ? 2. A salesman travelled at an average speed of 50 km/h for 2 hours.How far did he travel? 3. If Irene is going to the lake 60 km away at 40 kilometer per hour, how long will it take for her to get there?
- 21. VELOCITY PROBLEM Calculate the velocity of a car that travels 556 km northeast in 3.4 hours. If the distance covered by the joggers is 2541 meters through the park and the time it took to cover that distance was 43.6 minutes what was the speed of the jogger.
- 22. 3. How much time does it take a person to walk 12 km north at a velocity of 6.5 km/hr? 4. If took 3.5 hours for a train to travel the distance between two cities at a velocity of 120 km/h. How far did the train travel between the two cities?
- 23. •A man walks 7km East in 2hrs and 2km in 1hr in the same direction. a) What is the man’s average speed for the whole journey? b) What is the man’s average velocity for the whole journey? •A man walks 7km East in 2hrs and then 2.5km West in 1hr. a) What is the man’s average speed for the whole journey? b) What is the man’s average velocity for the whole journey?
- 24. •Calculate the speed of a car that went a distance of 125km in 2 hrs. •A baseball is thrown a distance of 60m. What is its speed if it takes 0.5s to cover the distance?
- 25. •How much time does it take for a bird flying at a speed of 45km/h to travel a distance of 1,800km? •A motorist travels 406km in 7hrs. What was the average speed in km/h and m/s? (1km = 1000m, 1h = 3600s)
- 26. •Lisa del Valle traveled 50km/hr with a total distance of 400km. How long did it take for her to reach her destination? •A plane’s average speed between two cities is 600 km/hr. If the trip takes 2.5 hrs. how far does the plane fly?
- 27. ACCELERATION Is change in velocity with respect to time. •3 ways to change velocity: •Change in speed •Change in direction •Change in speed and direction
- 29. •A rocket powered sleds are used to test the human response to acceleration. If a rocket- powered sled is accelerated to a speed of 444m/s in 1.83 seconds then what is the acceleration of the sled? •As a car comes to a stop, it slows from 25m/s in 2.8s. Find the acceleration of the car? •Determine the acceleration of a coaster which moves with a velocity of 10 m/s, after 2s its velocity is increases to 26 m/s
- 30. Acceleration with Conversion A car accelerates from rest to a speed of 36 km/h in 20 seconds. What is the acceleration of the car in m/s2?
- 31. •A car starting from rest is accelerated 5m/s2. Find its velocity after 5 seconds.
- 32. EXAMPLE: The motorcycle first moved from 0 to 40m. It took 5s to do this. From 0 the motorcycle is moving in its current state. We can observe the following: 1. The motorcycle moved 40m to the right in 5s. The rate at which the motorcycle changes its position is 40m per 5s or 40m/5s to the right
- 33. EXAMPLE: If the motorcycle maintains its current state, having a rate of 40m/5s We can observe the following: It means that after another 5s, the motorcycle will move an additional 40m to the right, which is a total of 80m for 10s, and so on.
Editor's Notes
- #9: Perhaps the first thing that comes to our mind is that force is simply a push or pull movement. But a more scientific concept of force is obtained when we consider the effect of that push or pull