Phys4AS17 AAChung

Lab 5: Trajectories Amy, Chris, and John March 15, 2017 Today's lab was to use our understanding of projectile motion to predict the impact point of a ball on an inclined board, and compare our experimental and calculated values. Theory:   This lab seeks to predict the impact point of a marble launched horizontally off of an aluminum "v-channel" . By testing to see if the marble lands in virtually the same spot through a number of tries (five in our initial test) we can measure the height and distance away from the launch point. This allows us to apply our constant acceleration kinematic formulas to calculate for the initial velocity (launch speed) of our ball. With this information, we can calculate for the value which the experiment wants to compare, the impact point of the marble on a wooden board on an incline. We solve for the distance from the launch point to the impact point mathematically, and we run the experiment as well so we can compare the tw...

Lab 4: Modeling the Fall of an Object Falling with Air Resistance Amy, Chris, and John March 13, 2017 Today's lab was essentially determining the relationship between air resistance force and speed.  Theory : The expectation that air resistance force on a particular object depends on the object's speed, its shape, and the material it is moving through. By calculating the object's terminal velocity we can find what the air resistance was. Through finding an object's terminal velocity the (mg of the object equals air resistance) because there is no acceleration and the net force on the falling object is zero. Through the power law equation given below, our group modeled the air resistance of the coffee filters. In this power law formula we determined k  takes into account the shape and area of the object, and v  is the velocity. We do not know what k  or v are, so we enacted scenarios where we knew what the force of air resistance was and the veloc...

Lab 3: Non-Constant Acceleration Problem Amy, Chris, and John March 8,2017 Today's lab was trying to find the distance an elephant wearing roller skates with rocket strapped to its back with a non-constant acceleration would go before coming to rest with derivations and excel spreadsheets. By shortening the intervals of time where average acceleration of an interval equals instantaneous acceleration then we can derive the change in position.  Theory:  For this lab our group was trying to analyze when an elephant, wearing roller skates with a rocket strapped to its back, would come to a stop before rolling off a cliff. The elephant has a rocket strapped to its back serving a deceleration that counts as a loss of mass as it continues burning fuel. Apparatus and Procedure:  For the equipment in this lab it was a laptop with excel and our lab handout. First we solved this problem derivations analytically. We were given a function of acceleration in respect to ti...

Lab 6: Measuring the Density of Metal Cylinders  Amy, Chris, and John  March 3,2017 Today's lab purpose was to measure the density of two metal cylinders and calculate the propagated error in each one of our density measurements by using a Vernier caliper and a scale.  Theory:  In this lab we had to figure out the density of two unknown metal cylinders and calculate the propagated uncertainty for each. For this particular lab there are factors where our calculations may have been slightly incorrect propagating a further error in our data. When measuring the density of each metal we used a Vernier caliper that outputs measurement readings in centimeters and is more precise up to two decimal places.  In order to calculate propagated uncertainty in our lab we used the propagated uncertainty of density we took partial derivatives and generated this formula:  Apparatus and Procedure:  For this lab we used the Vernier caliper and a sc...

Lab 2: Determination of g and some statistics for analyzing data Amy, Chris, and John March 1, 2017 Today's lab purpose was to examine the validity of the statement:  In the absence of all other external forces except gravity, a falling object will accelerate at 9.8 m/ s^2 .Calculate values of g by group and compare them to other group's findings of g and calculate the standard deviation as well as errors of uncertainty.  Theory:  For this particular lab we had to figure out a way of measuring g, looking at the distance between sparks on a long tape created by the spark generator as an object was in free fall. By measuring the distances of the position as the object was in free fall we could gather a time lapse of how fast the object was falling. We graphed the findings from our times and distances, from the tape with markings, and calculated through a velocity vs. time graph how fast the object was accelerating down or g though the slope of the data w...

Lab 1: Finding the Relationship between Mass and Period for an Inertial Balance Amy Chung  and  Chris Ceron February 27, 2017 Today's Lab purpose was to find the relationship between mass and period of oscillation due to the mass' weight on the inertial balance. Theory:   The experiment performed today was weighing an object and trying to calculate its period of oscillation. In this lab we tried to calculate a correlation from multiple known masses and their period of oscillation on an inertial balance to derive a formula that calculates an unknown mass.   Apparatus and Procedure:   Today's apparatus was made up of a clamp, a logger pro, laptop, photogate, and an inertial balance, and 8 different weights of 100 g each. We created our apparatus by clamping the inertial balance to the table by using the clamp. Next to our table was a stand where the tip pf the balance met the photogate sensor. We placed a strip of tape to the balance so as t...