Prelim paper 1

• What is the formula for calculating momentum?

  Momentum = mass x velocity
• What happens to energy in an elastic collision?

  Energy, momentum, and kinetic energy are conserved
• What is the value of $60 +$$626 - 635 - 648 +$$655$?


  645.6
• What are random uncertainties in measurements?

  Variations occur when measurements are repeated
• What are systematic uncertainties in measurements?

  Measurements are consistently smaller or larger than true value
• What is the difference between random and systematic uncertainties?

  • Random uncertainties:
  • Occur due to variations in repeated measurements
  • Systematic uncertainties:
  • Occur when all measurements are consistently off from the true value
• What is the significance of the term "impulse" in physics?

  Impulse is the change in momentum
• What does the term "uncertainty" refer to in physical measurements?

  It refers to the doubt about the measurement's accuracy
• What is the formula for calculating force?

  Force = mass x acceleration
• What is the relationship between force and acceleration?

  Force is directly proportional to acceleration
• If a mass of $2 \text{ kg}$ is accelerated at $3 \text{ m/s}^2$, what is the force applied?


  $6 \text{ N}$
• How does the concept of impulse relate to force and time?

  Impulse equals force multiplied by time
• What is the unit of momentum?

  kg·m/s
• Why is it important to consider uncertainties in measurements?

  To assess the reliability of the results
• If a measurement has a systematic error, what can be inferred about its accuracy?

  It is consistently off from the true value
• How can random uncertainties affect experimental results?

  They can lead to variations in repeated measurements
• What is the formula for calculating power?

  Power = work / time
• What does the term "work" refer to in physics?

  Work is done when a force moves an object
• If a force of $10 \text{ N}$ moves an object $5 \text{ m}$, what is the work done?


  $50 \text{ J}$
• How does the conservation of momentum apply in collisions?

  The total momentum before equals total after