The position of a particle is given by {r}↖{→}(t)=4 t {i}↖{\^}+2 t^2 {j}↖{\^}+5 {k}↖{\^} where t is in seconds and r in metre. Find the magnitude and direction of velocity {\v}( { }), at { }=1 {\ s}, with respect to x-axis [NEET 2023 mpr]

Question

The position of a particle is given by {r}↖{→}(t)=4 t {i}↖{\^}+2 t^2 {j}↖{\^}+5 {k}↖{\^} where t is in seconds and r in metre. Find the magnitude and direction of velocity  {\v}( {	}), at  {	}=1  {\ s}, with respect to x-axis  [NEET 2023 mpr]

Examsnet · Accepted Answer

Correct Answer is :  4√2ms−1,45∘

Class 11 NEET Physics Motion in a Straight Line Questions