which-expression-gives-the-instantaneous-velocity-for-a-2d-position-vector-rt

Question

Which expression gives the instantaneous velocity for a 2D2	ext{D} position vector R→(t)\overrightarrow{R}\left(tight)?

Accepted Answer

V→(t)=dR→dt\overrightarrow{V}\left(t\right)=\frac{d\overrightarrow{R}}{dt}

Answer

V→(t)=dV→dt\overrightarrow{V}\left(t\right)=\frac{d\overrightarrow{V}}{dt}

Answer

V→(t)=R→(t)t\overrightarrow{V}\left(t\right)=\frac{\overrightarrow{R}\left(t\right)}{t}

Answer

V→(t)=∫R→(t)dt\overrightarrow{V}\left(t\right)=\int\overrightarrow{R}\left(t\right)dt

Which expression gives the instantaneous velocity for a 2D2\(\text{D}\) position vector R→(t)\(\overrightarrow{R}\)\(\left\)(t\(\right\))?