$A$ lift is moving upwards. Its velocity-time graph is given. The distance covered by the lift is ........ $m$.

The velocity-time graph for a car is a semicircle as shown in the figure. Which of the following statements is correct?

Draw the $x-t$ graph for positive acceleration.

The following figures show velocity $v$ versus time $t$ curves. But only some of these can be realized in a particle. These are:

An object is moving with variable speed,then

$A$ bird flies with a velocity $(t-2) \text{ m/s}$ along a straight line, where $t$ is the time in seconds. The distance covered by it in a time of $4 \text{ s}$ is: (in $\text{ m}$)