The Frame of Reference NEET Questions

Physics - Kinematics

The Frame of Reference MCQ Questions


13.
For 2D motion, the displacement vector Δr when particle moves from r to r' is:
A.
Δr = r' + r
B.
Δr = r' − r = Δxi + Δyj
C.
Δr = r × r'
D.
Δr = |r' − r|
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ANSWER :
B. Δr = r' − r = Δxi + Δyj
14.
The displacement of an object depends on:
A.
The actual path taken between two points
B.
Only the initial and final positions
C.
The speed of the object
D.
The time taken to travel
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ANSWER :
B. Only the initial and final positions
15.
In a non-inertial frame of reference, Newton's laws of motion:

NEET - 2019

A.
Are always valid.
B.
Require the introduction of fictitious forces to be valid.
C.
Do not apply at all.
D.
Are valid without any modifications.
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ANSWER :
B. Require the introduction of fictitious forces to be valid.
16.
The magnitude of displacement is always:
A.
Greater than the path length
B.
Equal to the path length
C.
Less than or equal to the path length
D.
Greater than or equal to the path length
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ANSWER :
C. Less than or equal to the path length
17.
When an object returns to its starting point after completing a journey, its displacement is:
A.
Equal to the total path length
B.
Double the maximum distance from start
C.
Zero
D.
Equal to the circumference if path is circular
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ANSWER :
C. Zero
18.
Which of the following correctly describes a coordinate system used as a frame of reference?
A.
Only a point (origin) is needed
B.
An origin + set of axes (coordinate system) + a clock to measure time
C.
Only a clock is needed
D.
Only the direction of motion is needed
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ANSWER :
B. An origin + set of axes (coordinate system) + a clock to measure time