The Frame of Reference NEET Questions

Physics - Kinematics

The Frame of Reference MCQ Questions


7.
In a coordinate system for 1D motion, what does a negative position value indicate?
A.
The object is moving backwards
B.
The object is decelerating
C.
The object is located on the negative side of the chosen origin
D.
The object has negative mass
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ANSWER :
C. The object is located on the negative side of the chosen origin
8.
The choice of origin and positive direction in a reference frame is:
A.
Fixed by nature — cannot be changed
B.
Fixed by SI system
C.
A matter of choice — any convenient choice is valid
D.
Always the same as the direction of motion
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ANSWER :
C. A matter of choice — any convenient choice is valid
9.
Position vector r of a particle in a plane with reference to origin O is given by:
A.
r = xi + yj + zk
B.
r = xi + yj
C.
r = xi
D.
r = x + y
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ANSWER :
B. r = xi + yj
10.
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
11.
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
12.
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