THEORY
When an object's motion changes, what we are really saying is that its velocity changes. This can mean that it is speeding up, slowing down, or changing direction (since velocity is a vector quantity)
However, we are more interested in the RATE at which the velocity changes.
This is acceleration - the rate of change of velocity
VIDEO COMING SOON
When an object's motion changes, what we are really saying is that its velocity changes. This can mean that it is speeding up, slowing down, or changing direction (since velocity is a vector quantity)
However, we are more interested in the RATE at which the velocity changes.
This is acceleration - the rate of change of velocity
VIDEO COMING SOON
SAMPLE PROBLEM
video coming soon
video coming soon
GOING FURTHER
What does a cereal have to with motion? Well read on....
What does a cereal have to with motion? Well read on....
There are a number of ways we can explore this concepts further.
One aspect of most high school physics course on kinematics, is that they only concern themselves with constant acceleration. In reality however, acceleration, like displacement and velocity, can change with respect to time.
Velocity is the rate of change of displacement. Unit: ms-2
Acceleration is the rate of change of velocity.
So what is the rate of change of acceleration?
The answer to that is the jerk. So slope of the acceleration vs time graph is the jerk. Unit: ms-3
We can go further.
What is the rate of change of the jerk?
Well it's the snap. Unit: ms-4
Can we go further? Yep. The rate of change of snap is the crackle. Unit: ms-5
I think you can guess the next one.
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This video goes through the details of the concept of jerk |
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