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Flashcards for JEE Physics - Motion in a Straight Line Class 11

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Motion in a Straight Line
Flash cards
Page 2


Motion in a Straight Line
Flash cards
Kinematics
The study of the motion of the objects without taking into 
account the cause of their motion is called kinematics.
Page 3


Motion in a Straight Line
Flash cards
Kinematics
The study of the motion of the objects without taking into 
account the cause of their motion is called kinematics.
Frame of reference :
Three mutually perpendicular lines intersecting at a point is 
called frame of reference. Intersecting point is called the origin 
and three lines are named as X, Y & Z axes.
Page 4


Motion in a Straight Line
Flash cards
Kinematics
The study of the motion of the objects without taking into 
account the cause of their motion is called kinematics.
Frame of reference :
Three mutually perpendicular lines intersecting at a point is 
called frame of reference. Intersecting point is called the origin 
and three lines are named as X, Y & Z axes.
Position vector :
It is a line segment joining the position of in space to the origin 
of the reference frame directed from origin to particle. From 
the figure, Position vector of the points p is
Page 5


Motion in a Straight Line
Flash cards
Kinematics
The study of the motion of the objects without taking into 
account the cause of their motion is called kinematics.
Frame of reference :
Three mutually perpendicular lines intersecting at a point is 
called frame of reference. Intersecting point is called the origin 
and three lines are named as X, Y & Z axes.
Position vector :
It is a line segment joining the position of in space to the origin 
of the reference frame directed from origin to particle. From 
the figure, Position vector of the points p is
Rest & Motion
If position vector of a particle in a given reference frame does 
not change with time then it is said to be at rest with respect 
to that reference frame, and if its position vector changes with 
time then it is known as in motion with respect to the given 
reference frame. The state of rest and motion depends on the 
frame of reference.
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FAQs on Flashcards for JEE Physics - Motion in a Straight Line Class 11

1. What is motion in a straight line?
Ans. Motion in a straight line refers to the movement of an object along a path without any change in direction. It is characterized by the object's displacement, velocity, and acceleration in a single dimension.
2. How is displacement different from distance in motion?
Ans. Displacement refers to the change in position of an object in a particular direction, taking into account both magnitude and direction. Distance, on the other hand, refers to the total length of the path covered by the object, without considering direction.
3. What is the difference between speed and velocity in motion?
Ans. Speed is a scalar quantity that only considers the magnitude of the object's motion, i.e., the distance traveled per unit time. Velocity, on the other hand, is a vector quantity that includes both the magnitude and direction of the object's motion.
4. How do we calculate average velocity in motion?
Ans. Average velocity is calculated by dividing the total displacement of an object by the total time taken for the motion. It is given by the formula: average velocity = total displacement / total time.
5. What is the difference between uniform motion and non-uniform motion?
Ans. Uniform motion refers to the motion in which an object covers equal distances in equal intervals of time. The velocity remains constant throughout. Non-uniform motion, on the other hand, is when the object covers unequal distances in equal intervals of time, indicating a varying velocity.
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