First slide

Instantaneous Speed

Question

In one dimensional motion, instantaneous speed V satisfies 0 ≤ V < V₀

Moderate

A

The displacement in time T must always take non negative values.
B

The displacement x in time T satisfies -V₀T < x < V₀T.
C

The acceleration is always an non negative number
D

The motion has no turning points.

Solution

Since 0 ≤ speed < v₀, The particle may move along positive x - axis or along negative x - axis and magnitude of average velocity is less than v₀, so magnitude of displacement is less than v₀T and displacement may be positive or negative, so option (2) is right.

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