Force Lab Assignment (1)

Name Force Lab Assignment Mass Empty Cart: ______ Mass Heavy Cart: ______ Data Part 1: Empty Cart, 5º angle Distance (m) Time 1 (sec) Time 2 (sec) Avg. Time (sec) Avg. Velocity ( m/s) Final Velocity (m/s) Acceleration (m/s 2 ) Force (N) 0.20      0.40        0.60        0.80        Average Acceleration = Average Force = Data Part 2: Heavy Cart, 5º angle Distance (m) Time 1 (sec) Time 2 (sec) Avg. Time (sec) Avg. Velocity ( m/s) Final Velocity (m/s) Acceleration (m/s 2 ) Force (N) 0.20      0.40        0.60        0.80        Average Acceleration = Average Force = Data Part 3: Empty Cart,10º angle Distance (m) Time 1 (sec) Time 2 (sec) Avg. Time (sec) Avg. Velocity ( m/s) Final Velocity (m/s) Acceleration (m/s 2 ) Force (N) 0.20      0.40        0.60        0.80        Average Acceleration = Average Force = Data Part 4: Heavy Cart, 10º angle Distance (m) Time 1 (sec) Time 2 (sec) Avg. Time (sec) Avg. Velocity ( m/s) Final Velocity (m/s) Acceleration (m/s 2 ) Force (N) 0.20      0.40        0.60        0.80        Average Acceleration = _____ Average Force = _____

Theoretical Force Calculations F wt = m ∙ g when the object is falling straight down F Theoretical = m ∙ g ∙ sin θ = m ∙ (g ∙ sin θ) when the object is on an incline. Substituting in the numbers gives the following Mass cart x g ∙ sin 5° = Theoretical Force at 5º Mass cart x g ∙ sin 10° = Theoretical Force at 10º The theoretical applied force of gravity can be determined by using the formulas above. Theoretical force 5º angle empty cart: _____ Theoretical force 10º angle empty cart: _____ Theoretical force 5º angle heavy cart: _____ Theoretical force 10º angle heavy cart: _____ Calculate the percent error for each force. Percent Error = | Theoretical Force − Calculated Force Theoretical Force | x 100 Low angle empty cart = % High angle empty cart = % Low angle heavy cart = % High angle heavy cart = % Analysis Questions 1. Should the average force be the same for both carts when the angle is held constant? Explain your answer. 2. Was the average force the same for both carts (within reasonable error) when the angle is held constant? Use data to support your answer. Use Data from two sets of data for each question – include data for both angles OR both carts as necessary. 3. Write a relationship statement for the relationship between average acceleration and average force when the angle of incline is held constant. 4. Write a relationship statement for the relationship between mass and average force when the angle of incline is held constant.