Memory Anchor:

• Super Challenge:

  Stretch:

  Challenge:

Key Questions:

1. What does decelerating mean?
   • Decelerating means slowing down.
2. (Physics only)
   • (Physics only)
3. How can the acceleration of an object be calculated from a velocity-time graph?
   • The acceleration of an object can be calculated from the gradient of a velocity?time graph. The gradient of a graph is change of y divided by change in x, in this case is change in velocity divided by change in time.
4. What equation applies to uniform acceleration and what are the units involved?
   • The following equation applies to uniform acceleration: final velocity2 ? initial velocity2 = 2 ? acceleration ? distance v2 ? u2 = 2 a s final velocity, v, in metres per second, m/s initial velocity, u, in metres per second, m/s acceleration, a, in metres per second squared, m/s2 distance, s, in metres, m"
5. What acceration does an object falling freely under gravity, near the Earth?s surface any object have?
   • Near the Earth?s surface any object falling freely under gravity has an acceleration of about 9.8 m/s2.