Lesson 1.4 - Acceleration
Learning Goals:
By the end of this lesson, I will be able to:
Success Criteria:
By the end of this lesson, I can
VIDEO LESSON (12:50 min)
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Acceleration is the rate of change of velocity with respect to time. It is a vector quantity.
EXAMPLE PROBLEM #1
EXAMPLE PROBLEM #2
By the end of this lesson, I will be able to:
Success Criteria:
By the end of this lesson, I can
VIDEO LESSON (12:50 min)
Video is not accessible in some countries. If you cannot view it, you might need VPN to do so.
Acceleration is the rate of change of velocity with respect to time. It is a vector quantity.
The average acceleration over an interval is : \( \Delta t \)
\( \vec{a}= \frac{ \Delta \vec{v} }{ \Delta t }= \frac{ \vec{v}_2 - \vec{v}_1}{ \Delta t } \)
It SI unit is \( m/s^2 \).
EXAMPLE PROBLEM #1
A car accelerates from rest and reaches a speed of \( 18 m/s \) [W] in \( 6.2s \). Determine its average acceleration.
SOLUTION:
The same car then stops in 5.4s. Determine its average acceleration while stopping.
EXAMPLE PROBLEM #2
Gravity accelerates all objects at \( 9.81 m/s^2 \). How fast is an objects travelling if it falls for 8.2s?
SOLUTION:
最后修改: 2025年10月30日 星期四 00:14