Directions
To complete your evaluation of various materials for cell phone cases, you must create a case material evaluation report that describes the
motion and impact forces of several phone case materials under evaluation.
To begin your evaluation of different case materials, you must first define Newton's laws of motion and then describe how each of Newton's
laws applies to the motion you will be analyzing. As you will be presenting this report to various stakeholders, you have been asked to write
your definitions and descriptions with a nontechnical audience in mind.
Once you have described the relevant laws of motion, create force diagrams to model the motion for a phone dropped from a set height.
You should include diagrams, with their respective force vectors, for each phone drop. In your diagrams, address the following:
a. Define the height you will be using for each phone drop. As the researcher, you will choose a drop height of between 1 and 2 meters.
b. Using the provided mass of 6.2oz, or by measuring the mass of a personal cell phone, determine the mass you will be using for your
calculations. Remember to add the mass of the case material.
c. In your diagram, show the direction and name of each force on the cell phone both at the drop point and at the point of collision with
the ground.
Following the creation of the force diagram, use the information provided in the mass and collision time for various materials in the table
above to calculate the velocity before impact and deceleration at impact. Remember that deceleration is represented as negative
acceleration in force equations. In your calculations, assume a standard free fall acceleration during the fall and a velocity of 0(m)/(s) after the
impact. You should include calculations for the following scenarios:
a. A phone without a case
b. A phone with a silicone case
c. A phone with a hard plastic case
d. A phone with a rubber case
Using Newton's second law, calculate the force of impact for each scenario.
After you have completed your calculations, describe how force equations model the given scenario. In your description, address the
following elements:
a. Velocity before impact
b. Acceleration
c. Force
Finally, using data from your analysis, recommend the best material for a cell phone case. In your recommendations, address the following
elements:
a. Which of the trials results in the lowest force of impact on the phone?
b. What considerations, in physics or otherwise, might you have in recommending a material for a cell phone case?
Test Collision Mass Material Time Phone 6.2 0.01 Only (No oZ. seconds Case)
1.7 OZ. 1.1 oZ. 3.2
0.05 seconds
Silicone
Hard Plastic
0.03 seconds 0.08 seconds
Rubber
OZ.
Directions To complete your evaluation of various materials for cell phone cases, you must create a case material evaluation report that describes the motion and impact forces of several phone case materials under evaluation.
1.To begin your evaluation of different case materials,you must first define Newton's laws of motion and then describe how each of Newton's laws applies to the motion you will be analyzing.As you will be presenting this report to various stakeholders,you have been asked to write
your definitions and descriptions with a nontechnical audience in mind. 2.Once you have described the relevant laws of motion, create force diagrams to model the motion for a phone dropped from a set height You should include diagrams, with their respective force vectors, for each phone drop. In your diagrams, address the following: a.Define the height you will be using for each phone drop.As the researcher,you will choose a drop height of between 1 and 2 meters
b. Using the provided mass of 6.2 oz, or by measuring the mass of a personal cell phone, determine the mass you will be using for your calculations. Remember to add the mass of the case material. c. In your diagram, show the direction and name of each force on the cell phone both at the drop point and at the point of collision with the ground.
3.Following the creation of the force diagram,use the information provided in the mass and collision time for various materials in the table above to calculate the velocity before impact and deceleration at impact. Remember that deceleration is represented as negative acceleration in force equations. In your calculations, assume a standard free fall acceleration during the fall and a velocity of O m/s after the impact. You should include calculations for the following scenarios: a. A phone without a case b.A phone with a silicone case
c.A phone with a hard plastic case
d. A phone with a rubber case
4.Using Newton's second law,calculate the force of impact for each scenario 5.After you have completed your calculations.describe how force eguations model the given scenario.In your description,address the
following elements: a. Velocity before impact b.Acceleration c. Force
6.Finally,using data from your analysis,recommend the best material for a cell phone case. In your recommendations,address the following elements:
a. Which of the trials results in the lowest force of impact on the phone? b. What considerations, in physics or otherwise, might you have in recommending a material for a cell phone case?
