Free Fall = Vertical Velocity = Vertical Velocity An object falling free of all restraints An object falling free of all restraints No friction No friction.

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Presentation transcript:

Free Fall = Vertical Velocity = Vertical Velocity An object falling free of all restraints An object falling free of all restraints No friction No friction No air resistance No air resistance

Free Fall Equation v = g t v= velocity g= acceleration of gravity t= time

g= acceleration of gravity g = 9.8 m / s g = 9.8 m / s 2 on Earth ◊during each second an object falls, it gains 9.8 m/sec in velocity

V= g t 0 s … 0 m/s 0 s … 0 m/s 1 s … 10 m/s 1 s … 10 m/s 2 s … 20 m/s 2 s … 20 m/s 3 s … 30 m/s 3 s … 30 m/s 4 s … 40 m/s 4 s … 40 m/s 5 s … 50 m/s 5 s … 50 m/s

V= g t Each second of fall increases velocity by 9.8 m/sec

Free Fall Distance Equation d = ½ g t 2 d = distance traveled g= acceleration of gravity t = time of fall

Free fall example How fast will an object be falling after 8 seconds? falling after 8 seconds?

Free fall example 80 m/s

Free fall distance example How far will an object have fallen after 4 seconds?

Free fall distance example d = ½ g t 2 = ½ (9.8m/s)(4) 2 s = ½ (9.8m/s)(4) 2 s = 78.4 m = 7.84 x 10 1 m = 78.4 m = 7.84 x 10 1 m

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