Physics, asked by rahulprakash6480, 9 hours ago

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 v(t) and a(t) of the particle.
(b) Find the magnitude and direction of v(t) at t=1.0s.

Answers

Answered by aaryaniyer24
1

Answer:

(a)

 v (t)=d  r  /dt

       =3.0^  i   −4.0t  ^j  

​ a  (t)=d  v  (t)/dt

     =−4.0  ^j

 

(b)

 v  (2) =3.0^  i  −8.0 ^ j

v(2)=8.54m/s

∠v(2)=tan  −1  (−8/3)=−69.44  ∘ with x axis

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