Sept 15 th Kinematics questions from yesterday Quiz Wednesday.

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Presentation transcript:

Sept 15 th Kinematics questions from yesterday Quiz Wednesday

Misconceptions video

Acceleration due to gravity is 9.8 m/s 2 [down]. Down means toward the centre of the earth. All objects experience this same acceleration in free fall on Earth. In practice…..

Shoot the Monkey

Motion in one direction is independent of motion in a perpendicular direction For an object moving under Earth’s gravity, vertical motion and horizontal motion are independent When solving a projectile motion problem, apply the kinematics equations to each direction separately.

In the x-direction (horizontal) In the y-direction (vertical)

Ex 1: A football is kicked from the ground with an initial velocity of 25 m/s at an angle of 45- degrees with the horizontal. It lands on the ground some distance away. Determine the time of flight, the horizontal distance, and the peak height of the football. (time of flight = 3.61s, horizontal displacement =63.7m, height = 15.9m)

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