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L3 acceleration
- 2. LEARNING OBJECTIVES: •Give thethree things to consider in determining acceleration.
- 8. SAMPLE PROBLEM Given: a=? v= 10m/s t=45s Given: a=? v= 10m/s t= 45s Solution: a= v/t a= 10m/s 45s a= 0.22 m/s2
- 9. SAMPLE PROBLEM Jenny acceleratesat 45 m/s2 with in 120 seconds. Find the velocity? Given: a= 45 m/s2 v= ? t= 120s Solution: v = at v = (45 m/s2)(120s) v = 5,400m/s
Editor's Notes
- #2 After determining “how far the object moves?”, the next question will be “How fast did the object move?” This information can be provided by the object’s speed or velocity.
- #4 Having a uniform velocity while traveling is impossible to achieve. As we enter a road with heavy traffic, our vehicle slows down. Then after passing that crowded street, we speed up. There is a change in velocity. This change in velocity in a particular time interval is called accelartion.
- #5 Having a uniform velocity while traveling is impossible to achieve. As we enter a road with heavy traffic, our vehicle slows down. Then after passing that crowded street, we speed up. There is a change in velocity. This change in velocity in a particular time interval is called accelartion. Acceleration does not only refer to speeding up but also to slowing down.
- #6 For instance, a car is traveling north at a speed of 30 km/h, then turns right at corner while maintaining its speed. The speed of the car is uniform at 30 km/h but the velocity changes because its direction changes from north to east.
- #8 Since the velocity is increasing or decreasing uniformly with time, we can express the average velocity as the arithmetic average of the initial and final velocity.