Question

How are distance travelled related to time taken when an object travels equal distance in equal interval of time?

What indicates the motion of earth?

Give an example when we infer the motion indirectly

Answer 1

When a body travels equal distance in equal interval of time, it means it is travelling with uniform velocity.i.e, acceleration (a) is zero.
So, distance (s)=velocity (v)*time(t)

Motion of earth indicates rotational and circular motion.
We often perceive an object to be in motion when its position changes with time. However, there are situations where the motion is inferred through indirect evidences. For example, we infer the motion of air by observing the movement of dust and the movement of leaves and branches of trees.

Answer 2

Answer:

We know that when an object travels equal distances in equal intervals of time, it moves with uniform speed. This shows that the distance travelled by the object is directly proportional to time taken. Thus, for uniform speed, a graph of distance travelled against time is a straight line.