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Success Criteria:
I am able to explain how acceleration relates to changes in velocity and time.
I am ablt to accurately apply the formula for acceleration ( 𝑎 = Δ𝑣/Δ𝑡 ) to calculate acceleration in various scenarios.
I am ablt to connect the concept of acceleration to real-world phenomena, such as gravitational acceleration.
Fun Fact
In 1969, during the Apollo 11 mission, astronaut Neil Armstrong experienced an incredible acceleration when the Lunar Module, named Eagle, descended to the Moon’s surface. As it approached, the craft had to slow down rapidly from about 5,000 feet above the lunar surface to a gentle touchdown speed of about 2 miles per hour. This required precise control of the thrusters to achieve the right amount of deceleration without crashing!
Armstrong famously had to take manual control at the last minute to avoid landing in a boulder-strewn area. This moment showcased not just human skill but also the crucial understanding of acceleration and how it can impact landing safely on another celestial body. It was an extraordinary achievement in both engineering and physics!
Key terms
Acceleration: The rate of change of velocity of an object over time. It can be positive (speeding up), negative (slowing down, also known as deceleration), or zero (constant velocity).
Velocity: The speed of an object in a specific direction. Unlike speed, velocity includes direction, making it a vector quantity.
Deceleration: A type of acceleration that occurs when an object slows down. It is often referred to as negative acceleration.
Uniform Acceleration: A constant acceleration where the velocity of an object changes by the same amount in each equal time interval.
Non-Uniform Acceleration: Acceleration that changes over time; the rate of change of velocity varies.
Learning Tasks
Chapter 11.2 Knowledge and Understanding questions p.324
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