Theory:

In our daily life, we can observe force everywhere around us. For example, before entering our house, we open the closed door by pushing or pulling it; while riding a bicycle, the pedals are pushed to move the cycle forward.
 
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Opening the closed door
 
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A man riding a bicycle
Force is simply a push or pull that tends to change the state of a body. An object will move from its position when a force is applied to it. In general, force results in the motion of an object.
While jogging, the man is applying force to his feet to move from one place to another.
 
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Jogging
Rest:
An object is said to be in a state of rest when there is no change in its position with respect to time.
Initially, an object is stationary, meaning it is completely at rest. But, when you push or pull an object to any side, it moves out of its rest position, resulting in motion.
 
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Two boys pulling and pushing an object
Motion:
An object is said to be in the state of motion when its position changes with respect to time. From tiny atoms and molecules to larger stars and galaxies, everything is in motion.
Example:
Flying birds, moving cars, the flow of blood through veins and arteries.

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Flying birds
 
Do you think the walls of your classroom are in motion?
The walls of the classroom are not changing their position with respect to their surroundings, so it is said to be at rest.
 
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A classroom