1.6 Acceleration Due to Gravity.

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Presentation transcript:

1.6 Acceleration Due to Gravity

Projectile motion is motion in a vertical plane. A projectile, regardless of its mass, will always fall downward at the acceleration due to gravity. = 9.81 m/s2 5:09 2:26

The ball slows down as it rises. The ball stops at the maximum height. 1:58 The ball slows down as it rises. The ball stops at the maximum height. The ball speeds up as it falls back down.

A Graphical Representation of a Vertical Projectile Positive slope indicates positive velocity [up]. The slope is decreasing (getting less positive), indicating that the object is slowing down. Negative slope indicates negative velocity [down]. The slope is increasing in magnitude (getting more negative), indicating that the object is speeding up.

The position-time graph of a vertical projectile is a parabola.

The velocity time graph would have a constant slope of –9.81 m/s2. The slopes of the tangents on the position-time graph give us values of instantaneous velocity. The velocity time graph would have a constant slope of –9.81 m/s2. 3:17

Homework: read pages 54 – 62 Practice Problems pgs. 59, 60 1.6 Check and Reflect pg. 63 #’s 1 – 15