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PRACTICE / Distance and average speed

Distance after a direction change

A cart begins at +6 m/s with constant acceleration −2 m/s² and moves for 5 s.

Find the total distance travelled.

Organize the givens & assumptions
  • u = 6 m/s
  • a = −2 m/s²
  • t = 5 s

Constant acceleration throughout 5 s; motion is one-dimensional and distance counts both directions positively.

  1. A25 m25\ \mathrm m
  2. B13 m13\ \mathrm m
  3. C5 m5\ \mathrm m
  4. D9 m9\ \mathrm m

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