Physics Force & Motion UHS 2023
PMDC Verified Question 24 of 137
Which of the following is the correct definition of variable velocity?
A
Unequal distances are covered in equal intervals of time
B
Equal displacements are made in unequal intervals of time
C
Unequal displacements are made in equal intervals of time
D
Equal displacements are made in equal intervals of time
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option C: Unequal displacements are made in equal intervals of time
Concept:

Velocity defines the strict rate of change of displacement over time.

Solution:

  • If a body has uniform velocity, it covers the exact same displacement (same distance, same direction) every single second.


  • Variable velocity occurs if the rate changes. Thus, measuring equal time intervals (e.g., 1-second chunks) will yield unequal displacement vectors (either a different distance was covered, or it turned a corner).


Why other options are incorrect:

Option A describes variable speed (because distance is scalar). Option D describes uniform velocity.

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