# Free Fall - North Hunterdon-Voorhees Regional High School ... Free Fall Objectives 1.) define free fall 2.) explain that all falling objects accelerate 3.) agree that all objects fall at the same rate 4.) write the free fall equations Free Fall

Introduction Free Fall motion caused only by gravity all objects fall at the same rate - works in a vacuum: area with no air - ignores air resistance Acceleration Due to Gravity is a constant. is called g is = 10 m/s2 on surface of earth is different on the moon, but still constant

Free Fall Equations Key vv= vertical velocity (in m/s) dv = vertical distance (in meters) g = acceleration due to gravity (10 m/s2) t = time (in seconds) Vertical Velocity Equation vv gt Vertical Distance Equation

1 d v gt 2 2 Time to Fall Equation 2d v t g

One more free fall Worksheet A Free Fall Equations 1.) How fast will a ball be traveling if it falls for 5 seconds? Data Equation Math Answer

t = 5 seconds g = 10 m/s2 vv = gt vv = 10(5) vv = 50 m/s 2. An apple falls out of a tree and takes 1.75 seconds to strike the ground. How high was the apple from the ground? Data Equation

Math t = 1.75 seconds g = 10 m/s2 dv = 0.5gt2 dv = 0.5(10)(1.75)2 dv = 0.5(10)(3.06) dv = 0.5(30.6) Answer dv = 15.3 m

3. A plane drops a C.A.R.E. package to some needy people in the jungle from a height of 1000 m. How long will it take the package to strike the ground? Data dv = 1000 m Equation

Math g = 10 m/s2 t = 2dv/g t = 2(1000)/10 Answer t = 2000/10 t = 200 t = 14.1 seconds

Free Fall Equations Key: vv= vertical velocity (in m/s) dv = vertical distance (in meters) g = acceleration due to gravity (10 m/s2) t = time (in seconds) Vertical Velocity Steps

1. Multiply g times time vv gt Vertical Distance dv 0.5gt 2 Steps 1. Square time (multiply by itself) 2. Multiply by g

3. Multiply by 0.5 Time to Fall 2d v t g Steps 1. multiply dv times 2 2. divide by g 3. Press =

4. Press the square root button