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A body in one dimensional motion has zer...

A body in one dimensional motion has zero speed at an instant. At that instant, it must have

A

Zero acceleration

B

Non-zero acceleration

C

Zero velocity

D

Non-zero velocity

Text Solution

Verified by Experts

The correct Answer is:
C
Acceleration of the particle can be zero as well as non-zero, but when speed of the partcle is zero then its velocity is zero for sure at the same instant. Hence option (c ) is correct.
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Knowledge Check

  • For the one dimensional motion, described by x=t-sint

    A
    `x(t)gt0` for all `tgt0`
    B
    `v(t)gt0` for all `tgt0`
    C
    `a(t)gt0` for all `tgt0`
    D
    `v(t)` lies between 0 and 2

  • For a moving body at any instant of time

    A
    If the body is not moving, the acceleration is necessarily zero
    B
    If the body is slowing the retardation is negative
    C
    If the body is slowing, the distance is negative
    D
    If displacement, velocity and acceleration at that instant are known, we can find the displacement at any given time in future

  • In one dimensional motion, instantaneous speed v satisfies (0 le v lt v_0) .

    A
    The displacement in time `T` must always take non-negative values
    B
    The displacement `x` in time `T` satisfies `-v_0 T lt x lt v_0 T`
    C
    The acceleration is always a non-negative number
    D
    The motion has no turning points
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