physics

• What is the main force that keeps planets in orbit around the sun?

  Gravity
• Who is known as the gravity guy?

  Isaac Newton
• What does the formula Force = mass times acceleration represent?

  Relationship between force, mass, and acceleration
• What is force defined as?

  A push or pull on something
• What does mass measure?

  Amount of matter in an object
• What is acceleration?

  Change in velocity over time
• What happens when a force is applied to a fixed mass?

  It produces a predictable amount of acceleration
• What did Newton discover about two masses?

  They attract each other
• What is the Law of Universal Gravitation?

  How masses pull on each other
• How does distance affect gravitational pull?

  Greater distance results in smaller pull
• What is the Inverse-Square Law?

  Force decreases with the square of distance
• What keeps planets in orbit around the sun?

  Gravity and initial velocity
• What is Newton's first Law?

  An object in motion stays in motion
• What is a centripetal force?

  Force that keeps an object moving in a circle
• How do mass and weight differ?

  Mass is amount of matter; weight is gravitational force
• What happens to your mass on the moon compared to Earth?

  Your mass remains the same
• What happens to your weight on the moon?

  Your weight decreases due to weaker gravity
• What is the unit of energy?

  Joule
• What are the two main types of energy?

  Kinetic energy and potential energy
• What is kinetic energy?

  Energy of movement
• What is potential energy?

  Stored energy due to position
• What happens to potential energy when you drop an object?

  It converts to kinetic energy
• How is work defined?

  Force applied over distance
• What is the relationship between energy and work?

  Energy is total possible work; work is done
• What is the conservation of energy?

  Energy cannot be created or destroyed
• What happens to kinetic energy when a car stops?

  It is converted to heat energy
• What is temperature a measure of?

  Average kinetic energy of atoms
• What does thermodynamics study?

  Energy transfer and entropy
• What is entropy?

  Measure of disorder in a system
• What happens to the entropy of ice when it melts?

  It increases as it becomes water
• What is the trend of entropy in the universe?

  It is increasing over time
• How does burning gasoline affect entropy?

  It increases entropy by producing heat and gas
• What happens when water is frozen?

  Entropy decreases locally, but increases overall
• What is electric charge?

  Property of objects that can be positive or negative
• What is electric current?

  Flow of electrons through a wire
• What is voltage?

  Difference in electric potential
• What is resistance?

  Opposition to the flow of electric current
• What does Coulomb's Law describe?

  Attraction and repulsion of electric charges
• What do electric fields indicate?

  Direction of force on a charged particle
• What is unique about magnetic poles?

  They always come in pairs (north and south)