1. what happens when we dont see directly above the ruler

2. estimation is a __________

3. if an object changes its position with respect to time is called_______

4. curvilinear motion is also a__________ motion

5. a motion is said to be periodic if a action will repeat with ______interval of time

6. motion of a hockey player is rectilinear- True or false

7. 10km=_____m

8. m ,s,kg are ________ units

9. Measurement means the comparison of an unknown quantity with a –

10. Which of the following statements about measurement is correct?