Question

How can we obtain perceive an object to be in motion?

Answer 1

If it changes its position relative to other object ( usually called the frame of reference ) . It is a relative term
Motion is perceived with respect to a reference frame
An objectcan be in rest with respect to one frame of reference and in motion with respect to other .
hope you got it

Answer 2

Answer:

See below.

Explanation:

First, the human mind perceives from its own frame of reference.

Suppose, a person is standing on a ground ( Earth's surface ). Then motion of an object in front on our eyes is perceived when its position changes. Here, the frame of reference was the Earth.

Now, if we are travelling in a bus which has a speed of 10 km/hr. From the bus, we are looking at a car travelling of the either side of the bus at the same speed, then we will see that the car is not moving at all. From the car, the bus seems stationary and similarly from the bus, the car appears stationary.

But, both the cars are moving at 10 km/hr with Earth's frame of reference.

Hence, the human mind experiences motion only when it sees a displacement in its vision.