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Speed, acceleration, gravity, energy.

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  • What is kinetic energy?
    Kinetic energy is energy of motion.
  • What is potential energy?
    Potential energy is stored energy due to position.
  • A car travels 100 meters in 5 seconds. What is its speed?
    20   m/s
  • Convert 72 km to m.
    72000   m
  • What does a horizontal line on a distance-time graph represent?
    At rest, no movement.
  • What is the speed of light?
    Aprox. 3 x 10^8 m/s
  • Name two units commonly used to measure speed.
    Meters per second (m/s) and kilometers per hour (km/h)
  • What is the formula for calculating speed?
    s = d/t
  • What is displacement?
    Displacement is the straight-line change in position from start to end.
  • How is velocity different from speed?
    Velocity includes direction, it’s a vector; speed does not.
  • What does the graph that represents the acceleration of a car look like?
    It’s a curve, in a velocity-time graph.
  • What is distance?
    Distance is the total path traveled.
  • What is the formula for acceleration?
    a = (Vf-Vi)/t
  • A bike speeds up from 2 m/s to 6 m/s in 2 seconds. What is its acceleration?
    2   m/s2
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