Lab 6: Energy
Lab 6: Energy
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Background & Information
Background & Information
There are many different types of energy found everywhere. There's potential, gravitational, kinetic, spring, conservation of mechanical energy, and food energy. For this lab, we were tasked to calculate gravitational potential energy, spring energy, kinetic energy, and conservation of mechanical energy of some object. We also had to calculate energy from foods.
There are many different types of energy found everywhere. There's potential, gravitational, kinetic, spring, conservation of mechanical energy, and food energy. For this lab, we were tasked to calculate gravitational potential energy, spring energy, kinetic energy, and conservation of mechanical energy of some object. We also had to calculate energy from foods.
Methods
Methods
Conservation of Mechanical Energy: For this section we manipulated formulas to allow the top gravitational potential energy to equal the bottom kinetic energy. The top representing the ball at 10m and the bottom representing the ball as it hits the ground. Both had energies of 2.646 in their respective locations.
Conservation of Mechanical Energy: For this section we manipulated formulas to allow the top gravitational potential energy to equal the bottom kinetic energy. The top representing the ball at 10m and the bottom representing the ball as it hits the ground. Both had energies of 2.646 in their respective locations.
Spring Energy: We used a box with a hook to hold a spring. Then, we attached different weights to the end on the spring and measured the length each time. We added 7 different weights besides the initial.
Spring Energy: We used a box with a hook to hold a spring. Then, we attached different weights to the end on the spring and measured the length each time. We added 7 different weights besides the initial.
Kinetic Energy: To find kinetic energy we used a car. We weighed the car, 350g or 0.35kg. We used the calculated velocity from the velocity lab, 0.36m/s. To find the kinetic energy we used the formula KE=1/2mv^2. (1/2*0.35*0.36^2). The kinetic energy is 0.02268 J.
Kinetic Energy: To find kinetic energy we used a car. We weighed the car, 350g or 0.35kg. We used the calculated velocity from the velocity lab, 0.36m/s. To find the kinetic energy we used the formula KE=1/2mv^2. (1/2*0.35*0.36^2). The kinetic energy is 0.02268 J.
Gravitational Potential Energy: We did 6 trials to determine GPE. We dropped a ball weighing 0.027kg 5 times at 10m, 8m, 6m, 4m, 2m, and 0m. Then we multiplied mass*gravity*height.
Gravitational Potential Energy: We did 6 trials to determine GPE. We dropped a ball weighing 0.027kg 5 times at 10m, 8m, 6m, 4m, 2m, and 0m. Then we multiplied mass*gravity*height.
Energy from Food: We chose 5 different foods and weighed them. Then we calculated for energy using calories*the amount of J in a dietary joule.
Energy from Food: We chose 5 different foods and weighed them. Then we calculated for energy using calories*the amount of J in a dietary joule.
Conservation of Mechanical Energy
Conservation of Mechanical Energy
Conservation of mechanical energy is shown when gravitational potential energy is at its peak and kinetic energy is at the initial. Top gravitational potential energy is equal to the bottom kinetic energy. The equation used for GPE is GPE=mgh. The equation used for KE is KE=1/2mv^2. To get the velocity, mgh=1.2mv^2 was manipulated to isolate v. V=14.
Spring Energy
Spring Energy
To calculate spring energy, we needed to find the force of each weight. To do this, we used mass times gravity=force. The we divided Force by the displacement of the spring to get the spring constant, 0.30. Then, to find spring energy we used the formula SE=1/g (k)(x)^2
T1: 0.15kg, Displacement: 0cm, SE= 0
T2: 0.25kg, Displacement: 0.25cm, SE=0.00191
T3: 0.35kg, Displacement: 1cm, SE= 0.0306
T4: 0.55kg, Displacement: 3.25cm, SE= 0.323
T5: 0.65kg, Displacement: 4.1cm, SE= 0.51459
T6: 0.75kg, Displacement: 5.1cm, SE= 0.7962
T7: 0.85kg, Displacement: 6.5cm, SE= 1.29
Kinetic Energy
Kinetic Energy
This is a picture showing our car being weighed. To find the kinetic energy we used the formula KE=1/2mv^2. (1/2*0.35*0.36^2). The kinetic energy is 0.02268 J.
Gravitational Potential Energy
Gravitational Potential Energy
To calculate the gravitation potential energy, we measured the kilograms of a wiffle ball. Then, we multiplied mass*gravity*height = energy for each trial.
Energy from Food
Energy from Food
To calculate the energy in 5 different foods, we used the equation: Energy = Calories * 4184J
4184J is how many joules are in a dietary calorie.
Results
Results
Overall, this lab was very helpful for determining which energy belongs to which real life scenario. I feel confident now calculating energy. We found that a majority of energy equations are related or can be manipulated to find the variables.
Overall, this lab was very helpful for determining which energy belongs to which real life scenario. I feel confident now calculating energy. We found that a majority of energy equations are related or can be manipulated to find the variables.
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