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Question: Answered & Verified by Expert
7. In a two dimensional motion, instantaneous speed $v_0$ is a positive constant. Then, which of the following are necessarily true?
PhysicsMotion In Two Dimensions
Options:
  • A
    The average velocity is not zero at any time
  • B
    Average acceleration must always vanish
  • C
    Displacements in equal time intervals are equal
  • D
    Equal path lengths are traversed in equal intervals
Solution:
2837 Upvotes Verified Answer
The correct answer is:
Equal path lengths are traversed in equal intervals
As speed is a scalar quantity, hence it will be related with path length (scalar quantity) only.
Hence, Speed $v_0=\frac{\text { total distance travelled }}{\text { time taken }}$
So, total distance travelled = Path length $=($ speed $) \times$ time taken
Hence, path length which is scalar and traversed in equal intervals.

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