If the position vector of a particle is given by vec r= 5t^(2)hat i +7t hat j +4 hat k, then its velocity lies in:

If the position vector of a particle is given by vec r= 5t^(2)hat i +7

1.	If the position vector of a particle is given by vec r= 5t^(2)hat i +7t hat j +4 hat k, then its velocity lies in:
Answer» X-Z plane X-Y plane along Y-direction along X- direction Solution :`vec r= 5t^(2)hat i +7t hat J +4 hat K` Velocity`vec V= (d vecr)/(dt)= (d(5t^(2)hat i +7t hat j +4 hat k))/(dt)` `vec v= 10T hati+ 7 hat j`