Conservation of Energy Physics Lab
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Questions and Answers

What should be recorded in the data table after stopping the stopwatch?

  • The height of the ramp
  • The time taken to reach the second piece of tape (correct)
  • The distance marked on the ramp
  • The mass of the car

    • What does the conservation of energy principle state?

  • Energy can be created and destroyed.
  • Energy can only be created through motion.
  • Energy exists in a fixed amount and cannot change form.
  • Energy is neither created nor destroyed, only transformed. (correct)

    • How is gravitational potential energy (GPE) calculated?

  • GPE = mgh (correct)
  • GPE = mv^2
  • GPE = 1/2 mv^2
  • GPE = mg + h

    • How do you find the average time from your trials?

    <p>Divide the sum of all times by the number of trials</p> Signup and view all the answers

    What factor does NOT affect an object's gravitational potential energy?

    <p>Speed of the object</p> Signup and view all the answers

    What equation is used to calculate the speed of the car at the bottom of the ramp?

    <p>Speed = distance divided by time</p> Signup and view all the answers

    What is the outcome when calculating kinetic energy with regards to gravitational potential energy?

    <p>Kinetic energy should be less than gravitational potential energy</p> Signup and view all the answers

    Which equation represents kinetic energy?

    <p>KE = 1/2 mv^2</p> Signup and view all the answers

    What materials are required to construct the ramp for the lab experiment?

    <p>A plank of wood and a stack of books</p> Signup and view all the answers

    What is the value of 'g' used in gravitational potential energy calculations on Earth?

    <p>9.8 m/s²</p> Signup and view all the answers

    Which step is NOT part of the physics lab procedure?

    <p>Cook the toy car to ensure it's light.</p> Signup and view all the answers

    What type of energy is converted into heat due to friction during the experiment?

    <p>Kinetic energy</p> Signup and view all the answers

    What is the purpose of repeating the experiment multiple times?

    <p>To ensure accuracy by averaging the results</p> Signup and view all the answers

    What effect does increasing the height of the ramp have on the potential energy of the toy car?

    <p>It increases the potential energy.</p> Signup and view all the answers

    In the formula for gravitational potential energy, what is the standard acceleration due to gravity on Earth?

    <p>9.8 m/s²</p> Signup and view all the answers

    Study Notes

    Conservation of Energy

    • Energy is neither created nor destroyed, it only changes forms.
    • Gravitational Potential Energy (GPE): GPE = mgh, where
      • m is mass (kg)
      • g is acceleration due to gravity (9.8 m/s²)
      • h is height (m)
    • Kinetic Energy (KE): KE = ½mv², where
      • m is mass (kg)
      • v is velocity (m/s)
    • Energy is conserved, meaning the total energy remains constant.

    Physics Lab Procedure

    • Materials: Ramp, smooth surface, stopwatch, tape measure, duct tape, toy car, weighing scale.
    • Steps:
      1. Build a ramp.
      2. Mark start and stop points with duct tape, measure distances and height
      3. Release the car, start stopwatch at ramp bottom, stop at stop point.
      4. Repeat steps 3 at least five times.
      5. Record all trial times in a table.
      6. Calculate the average time.
      7. Measure the car's mass.

    Data Analysis

    • Calculate speed: Speed = Distance / Time (distance from ramp bottom to final tape, time = average time)
    • Calculate Kinetic Energy: Using the calculated speed and mass from the car
    • Calculate Gravitational Potential Energy: Using the starting height and mass of the car
    • Calculate energy lost as heat: Subtract the kinetic energy from the gravitational potential energy. The difference is the energy converted to heat through friction.

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    Description

    Explore the principles of energy conservation through a hands-on physics lab experiment. This quiz covers gravitational potential energy, kinetic energy calculations, and the lab procedure for measuring energy transformations in a toy car experiment. Test your understanding of these key concepts in physics.

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