Class 11 Physics · Chapter 11 · Test 1
Frames of Reference
22 MCQs This test covers relative motion, inertial and non-inertial frames of reference, and the two postulates of special relativity. It also covers the relativity of simultaneity and the idea of space-time as a unified continuum.
22 questions · 20 min · 22 marks
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Sample questions
The first 5 of 22. Try each one, then tap to see the answer.
Question 1
The state of rest or motion of an object depends on the:
- AMass of the object
- BObserver or frame of reference
- CColour of the object
- DShape of the object
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Answer: B
Rest and motion are relative to the observer or the chosen frame of reference.
Question 2
The walls of a moving train appear stationary to:
- AA person standing on the ground
- BA passenger inside the train
- CAn observer on a distant star
- DNo one
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Answer: B
Passengers share the train's motion so the walls are at rest relative to them.
Question 3
A ball is dropped inside a train moving with uniform velocity. An observer inside the train sees the ball:
- AMove backward
- BFall in a parabola
- CFall vertically to the floor
- DRise upward
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Answer: C
The observer shares the horizontal velocity of the ball so it falls straight down.
Question 4
The same ball dropped in a uniformly moving train appears to an observer on the ground to follow a:
- AStraight vertical line
- BParabolic path
- CCircular path
- DHorizontal line
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Answer: B
It moves like a projectile with an initial horizontal velocity.
Question 5
If the train is at rest the observers inside and outside the train see the ball:
- AFall differently
- BFall in a parabola
- CFall the same way
- DNot fall
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Answer: C
The horizontal velocity is zero for both so their observations agree.
More tests in Special Theory of Relativity
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