[Title, period and name] 10/3/13

Objectives  Objectives:  Part 1: Learn how to use a photogate timer and use it to determine the velocity of an object  Part 2: To predict where a steel ball bearing will land on the ground

Materials  Materials: [List the lab equipment needed]  Photogate timer and gate …………

Procedures: (Part 2)  [diagram]

Procedures: (Part 2) 1.Find the velocity of a steel ball from 1.00 m up the ramp (Part 1) 2.Measure the height of the table to 4 sig. figs. 3.Find the time that the steel ball will be in the air for 4.Use time from step #3 to calculate where the steel ball will land

Data Tables

Data Table: Finding V x Distance (m) Trial 1 (s) Trial 2 (s) Trial 3 (s) Trial 4 (s) Trial 5 (s) Time Ave (s)

Data: Calculated Prediction Diameter of ball: cm Height of Table: ____ Target distances: a) ___ b) ___ c) ___ for: d r = m trials 1) ___ 2) ___ 3) ___ 4) ___ 5) ___

Calculations: (Part 2) Make sure you use the correct UNITS!!!  Calc. #1: [show work] average time (t photo )  Calc. #2: [T-Chart] velocity (v ball = v x )  Calc. #3: [T-Chart] time (t air ) [projectile y-component]  Calc. #4: [T-Chart] horizontal distance (d x ) [projectile x-component] This is your predicted distance

Testing the Prediction  Place and tape the target on the floor with the “Target Line” at the distance that your prediction calculation.

Order of the lab Title: Objectives: Materials: Procedures: (Part 2 w/ diagram) Data Table: (For Part 1) Data: (For Part 2) Part 2 Calculations: Part 1 Calculations: Conclusion:

Part 2 Calculations: (T-Charts) Calc. #1: (show work) average time (t photo ) Calc. #2: velocity (v ball = v x ) Calc. #3: time (t air ) Calc. #4: horizontal distance (d x ) Error Analysis: (3 total - show work) Calc. #5: vertical velocity (v y ) Calc. #6: resultant velocity (v r )

Error Analysis  Measure distances from target (3 total)  Calculation the % error  Show your work  Calc. #5: (T-Chart) vertical velocity (v y )  Calc. #6: (T-Chart) resultant velocity (v r ) (target distance) % error =  × 100 (predicted distance)

Part 2: Calculations Calc. #1: (show work) average time (t photo ) Calc. #2: horizontal velocity (v ball = v x ) Calc. #3: time (t air ) Calc. #4: horizontal distance (d x ) Error Analysis: (3 total - show work) Calc. #5: vertical velocity (v y ) Calc. #6: resultant velocity (v r ) Part 1:Calculations (5 total T-Charts) Calc.: horizontal velocity (v ball = v x )

Calculations: (Part 1) For each distance:  Calculate the velocity of the ball in meters per second (m/s) using the diameter of the ball to be cm. (5 T-Charts Total)

Conclusion (paragraph form)  Explain the process of finding the velocity of the ball bearing and how you predicted where the ball bearing would land.  Identify ALL variables in the lab as independent, dependent or controlled  How many sig. figs. does each variable have?  How much of a role do you think air resistance and friction had and how would it affect your predicted horizontal distance to the actual distance?  How far off was your prediction in terms of distance and percent error?  What may have caused the ball to be off target? (give at least 3 reasons)

Order of the lab Title: Objectives: Materials: Procedures: (Part 2 w/ diagram) Data Table: (For Part 1) Data: (For Part 2) Part 2 Calculations: Part 1 Calculations: Conclusion: