Question

Very - short answer type Questions -

1) Give reason - a distance time graph can never be parallel to y axis ( distance axis )

2) under what condition magnitude of average speed is equal to average velocity?

3) what does the path of an object look like when it is in uniform motion ?

4) state the principle of time measuring devices ?

★ give the answer in short [ one word or one line ]

★ no explanation needed

Answer 1

Answer:

1) Give reason - a distance time graph can never be parallel to y axis ( distance axis )

2) under what condition magnitude of average speed is equal to average velocity?

3) what does the path of an object look like when it is in uniform motion ?

4) state the principle of time measuring devices ?

★ give the answer in short [ one word or one line ]

Answer 2

Question :

1) Give reason - a distance time graph can never be parallel to y axis ( distance axis )

Solution :

❖ A distance time graph can never be parallel to y axis because time keeps on changing but distance can be same .

See the fig for understanding -

⠀⠀⠀⠀⠀⠀X

⠀⠀⠀⠀⠀⠀|

Distance |

⠀⠀⠀⠀⠀⠀|⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀

⠀⠀⠀⠀⠀⠀|

⠀⠀⠀⠀⠀⠀|⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀ Y

⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀Time

★ correct

⠀⠀⠀⠀⠀⠀X

⠀⠀⠀⠀⠀⠀|⠀⠀⠀⠀⠀⠀⠀|

Distance |⠀⠀⠀⠀⠀⠀⠀|

⠀⠀⠀⠀⠀⠀|⠀⠀⠀⠀⠀⠀⠀|

⠀⠀⠀⠀⠀⠀|⠀⠀⠀⠀⠀⠀⠀|

⠀⠀⠀⠀⠀⠀|⠀⠀⠀⠀⠀⠀⠀|⠀⠀⠀⠀ Y

⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀Time

★ incorrect

$\rule{150}{2}$

Question :

2) under what condition magnitude of average speed is equal to average velocity ?

Solution :

❖Condition in which magnitude of average speed is equal to average velocity is -

If Total distance covered by a body is same as its displacement .

Ex . A•-------2km------>B

$\rule{150}{2}$

Question :

3) what does the path of an object look like when it is in uniform motion

Solution :

❖ the path of an object look like straight line when it is in uniform motion

$\rule{150}{2}$

Question :

4) state the principle of time measuring device ?

Solution :

❖ The principle of Time measuring device are based on periodic motion.