Physics Storyboard
Storyboard Text
- Wow! Look at that! Those two cars are moving so fast, almost at the same speed!!
- Huh... I dont understand why?
- You see, when we say that an object is in motion... we have to determine it through a reference point. For example the people in the second do not seem to be in motion for the poeple in the first car, as they are moving at the same speed. But through our perspective both the people in the car are in motion
- You're right... but for the people sitting inside 1 car, the other people are at rest.
- Let me explain more at school tomorrow
- The plane has a higher velocity, as more displacement within less time.
- Displacement/Time.... basically the rate of change of displacement. And if the distance = displacement.. then distance/time = velocity
- What is velocity?Absolutely well-answered.. Let us try to represent it on a graph
- On the left is the displacement time graph of a car, and the second one is of a plane. Which has a higher velocity?
- What is this?
- Then what is acceleration
- Well, this where our journey towards acceleration starts. The motion in graph 1 is an accelerated motion. Hence the speed of the object increased, Whereas in graph 2, the motion is decelerating and velocity is decreasing, hence the speed of the object reduces
- Acceleration on the other hand is the rate of change of velocity. Higher the rate of velocity, higher the acceleration. It is calculated by subtracting the initial velocity from the the final velocity and divided by time. If the equation = negative, the acceleration is called retardation.
- We will learn how to correctly plot the acceleration on a velocity time graph next class
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