Uniformly accelerated motion
Storyboard Text
- Okay class, any questions?
- Ma'am what is uniform acceleration really about?
- Of course dear! Just as I have discussed, It is The uniformly accelerated motion is a motion that is characterized for having a movement in a straight line and a constant acceleration and different of zero, therefore the velocity of an object in this movement is constantly changing depending on the direction of the velocity.
- Wow!
- How about some example ma'am?
- Students raise their hands, having questions. The teacher picks the girl first. "You first, dear." She says.
- Alright then. A car that is at rest starts to accelerate 2m/s, if it keeps accelerating for 10 seconds, define the velocity that the car will reach.
- The acceleration is the constant change of velocity. The sign or the direction that a velocity or an acceleration has could give a preview of what the movement is going to be like, if both acceleration and velocity have the same sign, then the object will increase the velocity every second, but if these magnitudes have different signs (for example a positive velocity and a negative acceleration) then the object will start to slow down every second until it is at rest.
- Fisrt we write the equation to usevf = vo + a * tIn this example we don´t have to clear the equationvf = 0 + 2 * 10 sSo we directly solve itvf = 20
- Next was the male student. He asked:
- She gave out an example. Explaining the solution of the car's velocity. The equation was Vo = 0 a = 2 m/s t = 10 s Vf = ?
- The answer was 20.
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