A particle is moving along a straight line with constant acceleration. At the end of tenth second its velocity becomes $20\, m/s$ and in tenth second it travels a distance of $10\, m$. Then the acceleration of the particle will be........$m/s^2$
$10$
$20$
$0.2$
$3.8$
Obtain equations of motion for constant acceleration using method of calculus.
A body of mass $10\, kg$ is moving with a constant velocity of $10 \,m/s$. When a constant force acts for $4 \,seconds$ on it, it moves with a velocity $2 \,m/sec$ in the opposite direction. The acceleration produced in it is...........$m/{\sec ^2}$
A particle starts from rest and traverses a distance $l$ with uniform acceleration, then moves uniformly over a further distance $2 l$ and finally comes to rest after moving a further distance $3 l$ under uniform retardation. Assuming entire motion to be rectilinear motion the ratio of average speed over the journey to the maximum speed on its ways is