The velocity of a body moving with a uniform acceleration of $2\,\,m/{\sec ^2}$ is $10\,\,m/\sec $. Its velocity after an interval of $4 \,sec$ is...........$m/\sec $
$12$
$14$
$16$
$18$
Two cars $A$ and $B$ at rest at same point initially. If $A$ starts with uniform velocity of $40\, m/sec$ and $B$ starts in the same direction with constant acceleration of $4\,m/{s^2}$, then $B $ will catch $A$ after how much time.........$sec$
The velocity $v$ of a particle moving along $x$-axis varies with its position $(x)$ as $v=\alpha \sqrt{x}$; where $\alpha$ is a constant. Which of the following graph represents the variation of its acceleration (a) with time $(t)$ ?
A particle is moving in a straight line such that its velocity is increasing at $5\,ms ^{-1}$ per meter. The acceleration of the particle is $ms ^{-2}$ at a point where its velocity is $20\,ms ^{-1}$.