For the velocity-time graph shown in the figure,in a time interval from $t=0$ to $t=6\,s$,match the following columns.
Column $I$ Column $II$
$(A)$ Change in velocity $(p)$ $-5/3\,SI \text{ unit}$
$(B)$ Average acceleration $(q)$ $-20\,SI \text{ unit}$
$(C)$ Total displacement $(r)$ $-10\,SI \text{ unit}$
$(D)$ Acceleration at $t=3\,s$ $(s)$ $-5\,SI \text{ unit}$

  • A
    $(A \rightarrow r, B \rightarrow p, C \rightarrow r, D \rightarrow s)$
  • B
    $(A \rightarrow p, B \rightarrow r, C \rightarrow r, D \rightarrow s)$
  • C
    $(A \rightarrow r, B \rightarrow r, C \rightarrow p, D \rightarrow s)$
  • D
    $(A \rightarrow p, B \rightarrow p, C \rightarrow r, D \rightarrow s)$

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State whether the following statements are true or false:
$(a)$ An object can have acceleration even when its velocity is zero.
$(b)$ If the acceleration of a moving object is constant,the direction of its velocity must remain the same.
$(c)$ The speed of an object can never be zero.

Which one of the following statements is wrong?

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