, PHYSICS MOTION
Motion
Rest and Motion
If the position of an object does not change as time passes, then it is said to be at rest. If the position
of an object changes as time passes, then it is said to be in motion.
An object can be at rest with respect to one thing and in motion with respect to some other thing at the
same time. So, the states of rest and motion are relative only.
To locate the position of an object, we have to choose some suitable reference point called the
origin.
Distance and Displacement
The distance travelled by an object is the length of the actual path traversed by the object during
motion. It is a scalar quantity.
The displacement of an object in motion is the shortest distance between the initial position and the
final position of the object. It is a vector quantity.
The distance travelled by an object in motion can never be zero or negative.
The displacement of an object can be positive, zero or negative. Never can the distance travelled be
less than the displacement.
Both distance and displacement have the same units.
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Motion
Rest and Motion
If the position of an object does not change as time passes, then it is said to be at rest. If the position
of an object changes as time passes, then it is said to be in motion.
An object can be at rest with respect to one thing and in motion with respect to some other thing at the
same time. So, the states of rest and motion are relative only.
To locate the position of an object, we have to choose some suitable reference point called the
origin.
Distance and Displacement
The distance travelled by an object is the length of the actual path traversed by the object during
motion. It is a scalar quantity.
The displacement of an object in motion is the shortest distance between the initial position and the
final position of the object. It is a vector quantity.
The distance travelled by an object in motion can never be zero or negative.
The displacement of an object can be positive, zero or negative. Never can the distance travelled be
less than the displacement.
Both distance and displacement have the same units.
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