L2 (Glitchy, TO BE REVIEWED...)

• What does the term "dissipated" mean in the context of energy?

  Energy that is transferred to the environment so that it can no longer be usefully transferred
• When an object falls, which energy store decreases and which energy store increases?

  Gravitational potential decreases, kinetic store increases
• In the scenario of a person pushing a skateboard, which energy store is energy being transferred into usefully?

  Kinetic store
• Which energy store is being transferred as waste when pushing a skateboard?

  Thermal store (of environment/surrounds)
• How do you convert kinetic energy from Joules to kilojoules?

  Divide by 1000
• If a bike has a kinetic energy of 5000 J and travels at 10 m/s, what is its mass?

  The mass of the bike is 100 kg
• How do you calculate the velocity of a horse with a mass of 2000 kg and kinetic energy of 4000 J?

  The velocity is 2 m/s
• What happens to kinetic energy when mass is doubled while keeping velocity constant?

  • Kinetic energy doubles
  • \( E_k \) increases by a factor of 2
• What happens to kinetic energy when velocity is doubled while keeping mass constant?

  • Kinetic energy quadruples
  • \( E_k \) increases by a factor of 4
• How do you compare the kinetic energy of two objects with the same mass but different velocities?

  The object with the higher velocity has greater kinetic energy
• If two objects have the same velocity but different masses, which has more kinetic energy?

  The object with the greater mass has more kinetic energy
• What is the formula for kinetic energy when mass is 6000 kg and velocity is 10 m/s?

  Use \( E_k = \frac{1}{2} m v^2 \) to find \( E_k = 300,000 J \)
• What is the effect of doubling the mass on the kinetic energy store?

  The kinetic energy store also doubles
• What is the effect of doubling the velocity on the kinetic energy store?

  The kinetic energy store quadruples
• How do you determine which of two objects has a higher kinetic energy when both have the same mass but different velocities?

  Calculate \( E_k \) for both and compare the results
• If an object has a mass of 3000 kg and a velocity of 50 m/s, what is its kinetic energy?

  Use \( E_k = \frac{1}{2} m v^2 \) to find \( E_k = 3,750,000 J \)
• What is the formula for kinetic energy when mass is 3000 kg and velocity is 10 m/s?

  Use \( E_k = \frac{1}{2} m v^2 \) to find \( E_k = 150,000 J \)
• How does the kinetic energy of an object change if its mass is doubled and its velocity is halved?

  The kinetic energy remains the same
• If a car has a mass of 4000 kg and travels at 20 m/s, what is its kinetic energy?

  Use \( E_k = \frac{1}{2} m v^2 \) to find \( E_k = 800,000 J \)
• What is the correct unit for mass in the kinetic energy formula?

  Kilograms (kg)
• What is the correct unit for velocity in the kinetic energy formula?

  Metres per second (m/s)
• What is the relationship between kinetic energy and velocity?

  Kinetic energy increases with the square of the velocity
• How does the kinetic energy of an object change if its velocity is doubled?

  The kinetic energy increases by a factor of 4
• If a horse has a mass of 2000 kg and a kinetic energy of 4000 J, what is its velocity?

  The velocity is 2 m/s
• What is the formula for kinetic energy when mass is 90 kg and velocity is 2 m/s?

  Use \( E_k = \frac{1}{2} m v^2 \) to find \( E_k = 180 J \)
• What is the formula for kinetic energy when mass is 90 kg and velocity is 4 m/s?

  Use \( E_k = \frac{1}{2} m v^2 \) to find \( E_k = 720 J \)
• How do you determine the factor increase in kinetic energy when velocity is doubled?

  Calculate the ratio of the new kinetic energy to the original kinetic energy
• If an object has a mass of 6000 kg and a velocity of 10 m/s, what is its kinetic energy?

  Use \( E_k = \frac{1}{2} m v^2 \) to find \( E_k = 300,000 J \)
• What is the formula for kinetic energy when mass is 3000 kg and velocity is 20 m/s?

  Use \( E_k = \frac{1}{2} m v^2 \) to find \( E_k = 600,000 J \)
• What is the effect of increasing both mass and velocity on kinetic energy?

  Kinetic energy increases significantly, depending on the values of mass and velocity
• How do you compare kinetic energy when both mass and velocity are varied?

  Calculate \( E_k \) for each scenario and compare the results