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= Introduction =
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'''- Motion in one dimension'''
'''- Motion in one dimension'''
In this unit, we will attempt to
In this unit, we will attempt to understand and describe motion and explain the motion of objects. Kinematics is the science of describing the motion of objects using
understand and describe motion and explain the motion of objects.
words, diagrams, numbers, graphs, and equations.
Kinematics is the science of describing the motion of objects using
words, diagrams, numbers, graphs, and equations.
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We have already seen that the
We have already seen that the study of Physics is about building models and a framework to explain the phenomena we observe. If we need to build a model, we need to
study of Physics is about building models and a framework to explain
develop a common vocabulary to describe our observations. Once we have the vocabulary, we can use that to analyze the motion of objects
the phenomena we observe. If we need to build a model, we need to
develop a common vocabulary to describe our observations. Once we
have the vocabulary, we can use that to analyze the motion of objects
and ultimately explain how they move in the way they do.
and ultimately explain how they move in the way they do.
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In this unit, we will study Motion in One Dimension and the equations of motion that describe the case of motion with uniform acceleration.
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= Concept Map =
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This concept map needs some work. Please refine it and share on the mathssciencestf@googlegroups.com.
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= Distance and displacement =
= Distance and displacement =
When we begin to describe motion,
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the first thing that comes to mind is that of direction. It is not
In the world around us, we see different objects around us. What would be one of the first observations you would make about an object? The first thing we
enough to know that something has moved; it is equally important to
would notice (other than the shape, size, color, etc.) is whether it is moving or at rest. We often perceive motion (movement) when
know where it has moved. There are many quantities in Physics that
something changes its position with respect to time. Alternatively, we can infer that something has moved after observing its
get their relevance from the direction in which they are operating.
surroundings. Can you think of examples that describe both these?
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When we begin to describe motion, the first thing that comes to mind is that of direction. It is not enough to know that something has moved; it is equally important to
know where it has moved. There are many quantities in Physics that get their relevance from the direction in which they are operating.
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When a quantity can be described
When a quantity can be described just by its magnitude, it is called a scalar. For instance, mass. It is not very meaningful to say, that body A has mass 20 kg in the
just by its magnitude, it is called a scalar. For instance, mass.
eastern direction. On the other hand, I do need to know which is the path to take from Town A to Town B. The description of the path from
It is not very meaningful to say, that body A has mass 20 kg in the
eastern direction. On the other hand, I do need to know which is the
path to take from Town A to Town B. The description of the path from
A to B is meaningful when I know the direction of travel.
A to B is meaningful when I know the direction of travel.
