The initial position of an object at rest is given by $3 \hat{i}-8 \hat{j}$ It moves with constant acceleration and reaches to the position $2 \hat{i}+4 \hat{j}$ after $4 \,s$. What is its acceleration?
$-\frac{1}{8} \hat{i}+\frac{3}{2} \hat{j}$
$2 \hat{i}-\frac{1}{8} \hat{j}$
$-\frac{1}{2} \hat{i}+8 \hat{j}$
$8 \hat{i}-\frac{3}{2} \hat{j}$
When the average and instantaneous accelerations are equal ?
Explain average velocity ,instantaneous velocity and components of velocity for motion in a plane.
Starting from the origin at time $t=0,$ with initial velocity $5 \hat{ j }\, ms ^{-1},$ a particle moves in the $x-y$ plane with a constant acceleration of $(10 \hat{ i }+4 \hat{ j })\, ms ^{-2}$. At time $t$, its coordinates are $\left(20\, m , y _{0}\, m \right) .$ The values of $t$ and $y _{0},$ are respectively
An observer moves with a constant speed along the line joining two stationary objects. He will observe that the two objects