physics paper 1

• What is a system in physics?

  A system is an object or group of objects.
• What happens to energy storage when a system changes?

  There are changes in the way energy is stored when a system changes.
• How is the kinetic energy of a moving object calculated?

  The kinetic energy is calculated using the equation: $E_k =$$0.5 \times m \times v^2$
• What are the units for kinetic energy?

  Kinetic energy is measured in joules (J).
• What is the unit for mass in the kinetic energy equation?

  The unit for mass is kilograms (kg).
• What is the unit for speed in the kinetic energy equation?

  The unit for speed is metres per second (m/s).
• How is elastic potential energy stored in a stretched spring calculated?

  Elastic potential energy is calculated using the equation: $E_e =$$0.5 \times k \times e^2$
• What are the units for elastic potential energy?

  Elastic potential energy is measured in joules (J).
• What is the unit for the spring constant in the elastic potential energy equation?

  The unit for the spring constant is newtons per metre (N/m).
• What is the unit for extension in the elastic potential energy equation?

  The unit for extension is metres (m).
• How is gravitational potential energy gained by an object calculated?

  Gravitational potential energy is calculated using the equation: $g.p.e. =$$m \times g \times h$
• What are the units for gravitational potential energy?

  Gravitational potential energy is measured in joules (J).
• What is the unit for mass in the gravitational potential energy equation?

  The unit for mass is kilograms (kg).
• What is the unit for gravitational field strength in the gravitational potential energy equation?

  The unit for gravitational field strength is newtons per kilogram (N/kg).
• What is the unit for height in the gravitational potential energy equation?

  The unit for height is metres (m).
• How is change in thermal energy calculated?

  Change in thermal energy is calculated using the equation: $\Delta Q =$$m \times c \times \Delta T$
• What are the units for change in thermal energy?

  Change in thermal energy is measured in joules (J).
• What is the unit for specific heat capacity in the thermal energy equation?

  The unit for specific heat capacity is joules per kilogram per degree Celsius (J/kg°C).
• What is the unit for temperature change in the thermal energy equation?

  The unit for temperature change is degrees Celsius (°C).