You have been provided with specifications for case materials in the table below. However, you may also use your own figures for the mass of phones and test case materials. As you use this data, ensure that you have made the necessary SI unit conversions:

Test Material   Mass                              Collision Time
Phone only (no case) 6.2 oz.    0.01 seconds
Silicone 1.7 oz. 0.05 seconds
Hard Plastic 1.1 oz.    0.03 seconds
Rubber 3.2 oz. 0.08 seconds

As the researcher, you will choose a drop height of between 1 and 2 meters.

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.

1) Following the creation of the force diagram, use the information provided in your case specification document 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 phone without a case
A phone with a silicone case
A phone with a hard plastic case
A phone with a rubber case

2) Using Newton’s second law, calculate the force of impact for each scenario.

3) After you have completed your calculations, describe how force equations model the given scenario. In your description, address the following elements:

Velocity before impact

Acceleration

Force

Question

You have been provided with specifications for case materials in the table below. However, you may also use your own figures for the mass of phones and test case materials. As you use this data, ensure that you have made the necessary SI unit conversions:

Test Material   Mass                              Collision Time
Phone only (no case) 6.2 oz.    0.01 seconds
Silicone 1.7 oz. 0.05 seconds
Hard Plastic 1.1 oz.    0.03 seconds
Rubber 3.2 oz. 0.08 seconds

As the researcher, you will choose a drop height of between 1 and 2 meters.

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.

1) Following the creation of the force diagram, use the information provided in your case specification document 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 phone without a case
A phone with a silicone case
A phone with a hard plastic case
A phone with a rubber case

2) Using Newton’s second law, calculate the force of impact for each scenario.

3) After you have completed your calculations, describe how force equations model the given scenario. In your description, address the following elements:

Velocity before impact
Acceleration
Force

Accepted Answer

Force diagram
At the drop point

During impact