CP1: motion

• what is the difference between a vector and scalar quantity?

  Vector: has magnitude and direction. Scalar: has only magnitude.
• what is the difference between displacement and distance?

  distance is a scalar quantity that refers to how much ground an object has covered during its motion.

  displacement is a vector quantity that refers to how far out of place an object is and is the overall change in position.
• what is the difference between velocity and speed?

  Velocity: includes both speed and direction. Speed: only measures how fast an object is moving.
• what is acceleration? 


  acceleration is a change in velocity (size and direction) over time
• What is the equation relating distance, speed and time?

  Distance = Speed x Time

  
• Interpreted distance/time graphs:


  If the speed of an object changes, it will be accelerating or decelerating.

  
• How do you determine speed from the gradient of a distance time graph?


  The gradient of an object is equal to the speed
• what is the equation for acceleration, velocity and time?

  Acceleration = change in velocity (m/s)/ time taken (s)

  v = final velocity

  u = initial velocity

  
• what is the formula for acceleration, velocity and distance?

  Change in velocity = final velocity (v) - initial velocity (u)

  
• what is the acceleration in freefall?

  on earth the acceleration of freefall is 10 m/s ^2
• interpret velocity time graphs:

  the slope or gradient of the graph tells us the acceleration of the vehicle, the area under the graph tells us the distance travelled.

  
• how do you form standard form?

  for example: 5 X 10^-1