MOTION AND TIME

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Across
  1. 5. triangular piece in sundial
  2. 6. which clocks are more accurate
  3. 7. the instrument to measure the speed of a moving
  4. 9. change in position of an object in relative to reference
  5. 10. the largest sundial is located in India
Down
  1. 1. one complete to and fro movement of
  2. 2. total distance divided by total time
  3. 3. substance whose crystals vibrate and at very precise rate
  4. 4. who invented pendulam
  5. 8. the small mass tied to a pendulam