Question

true or false
1. the si unit of length is kilometer.
2. pace or a footstep can be used as a standard unit of length .
3. motion is the change in position of an object with respect to time.
4. the motion of the minute hand of a clock is oscillatory.
5. a group of soldiers marching during guard of honor depicts periodic motion. ​

Answer 1

Explanation:

1 false

2.true

3.true

4.false

5.true