Calculate the car’s average VELOCITY

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Presentation transcript:

Calculate the car’s average VELOCITY A car travels around a corner by traveling 50 meters east, then 50 meters north. It makes the trip in 50 seconds. Calculate the car’s average VELOCITY Displacement = ? Displacement = 70.7m Time = 50s

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How does gravity affect falling objects? Causes all free-falling objects to accelerate down to the ground at the same rate Gravity determines an objects weight Why did the three balls fall to the ground at the same time as the book?

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Top 5 Facts for objects thrown straight up & free fall! “g” is ALWAYS -9.8 m/s2 If thrown up, the velocity is zero at max height! Time going up = Time going down All kinematic equations may be used for vertical projectiles… EXCEPT V = d/t and V = (Vf + Vii)/2 Even at max height when final velocity is zero, “g” is still -9.8 m/s2

How about the displacement of an object in free fall? An object is thrown up with an initial velocity of 19.6 m/s. How high does it go up before coming back down if it stays in the air for 2 seconds? Accelerating up is positive and down negative Air resistance is negligible… ALWAYS!!! Challenge students to figure this out! Cut time in air in half for distance to peak!

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