question_answer 20)

The position of a particle is given by   where t is in seconds and the coefficients have the proper units for  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 s ?                                     [Delhi 10]  

Answer:

(a) Given:     . . (b) At t = 2s,   The magnitude of the velocity is . The direction of velocity is given by                                         with x-axis.