Physics
NULL
Medium
Question
A body can have constant velocity when it follows a_____________?
A
Elliptical path
B
Circular path
C
Parabolic path
D
Rectilinear path
✓ Official correct answer
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A
Elliptical path
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B
Circular path
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C
Parabolic path
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D
Rectilinear path
No member explanations yet for this option.
Explanation
Velocity is a vector, so it is truly constant only when both speed and direction stay unchanged, which happens only along a straight-line (rectilinear) path -- in circular, elliptical, or parabolic paths, the direction continually changes even if speed does not.
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