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The position of a particle is given by where t is in seconds and the coefficients have the proper units for r to be in metres. (a) Find the v and a of the particle? (b) What is the magnitude and direction of velocity of the particle at t = 2.0 s ? | Learn NCERT solution | Education portal Class 11 Physics | Study online Unit-4 Motion In A Plane

### Q.20:- The position of a particle is given by

### where *t* is in seconds and the coefficients have the proper units for *r* to be in metres.

(a) Find the *v* and *a* of the particle?

### (b) What is the magnitude and direction of velocity of the particle at *t* = 2.0 s ?

**Answer:- **