The speed$-$time graph of a body is a straiaht line parallel to time axis. The body has

If the acceleration of the particle is constant in magnitude but not in direction, what type of path does the particle follow ?

Explain the following type of motion with one example of each

$(i)$ Acceleration is positive

$(ii)$ Acceleration is negative

$(iii)$ Acceleration is zero.

The velocity$-$time graph of an ascending passenger lift is as in the figure shown below

$(i)$ Identify the kind of motion of lift represented by lines $OA$ and $BC$.

$(ii)$ Calculate the acceleration of the lift

$(a)$ During the first two seconds.

$(b)$ Between the $3^ {r d}$ and $10^ {t h}$ second.

$(c)$ During the last two seconds.

Can you suggest about the kind of motion of a body from following distance$-$time graphs ?