The engine of a motorcycle can produce a maximum acceleration $5 \,ms^{-2}$. Its brakes can produce a maximum retardation $10\, ms^{-2}$. What is the minimum time in which it can cover a distance of $1.5\, km$.........$sec$
$30$
$15$
$10$
$5 $
The velocity-time and acceleration-time graphs of a particle are given as Its position-time graph may be gvien as
Give important factor to control the speed of vehicle in area of school or hospital.
Acceleration-time graph is given. If initial velocity is $5\,\,m/s,$ then velocity after $2$ $seconds$ is.......$m/s$
Two trains travelling on the same track are approaching each other with equal speeds of $40\, m/s$. The drivers of the trains begin to decelerate simultaneously when they are just $2.0\, km$ apart. Assuming the decelerations to be uniform and equal, the value of the deceleration to barely avoid collision should be.........$m/{s^2}$
A dancer moves counterclockwise at constant speed around the path shown below. The path is such that the lengths of its segments, $PQ, QR, RS$, and $SP$, are equal. Arcs $QR$ and $SP$ are semicircles. Which of the following best represents the magnitude of the dancer’s acceleration as a function of time $t$ during one trip around the path, beginning at point $P$ ?