Question

A body startsmoving with velocity 20 m/s with a constant deceleration of 5 m/S^2. Find the distance and displacement of particle after 10 sec of motion.

Answer 1

ur ans. could be 40m displacement not sure

Answer 2

Hii there,
$initial \: velocity = 20 \: \frac{m}{s} \\ acceleration = \frac{- 5m}{ {s}^{2} } \\ \\ using \: 2nd \: equation \: of \\ uniformly \: motion. \\ \\ s = ut + \frac{1}{2}a {t}^{2} \\ = 20 \times 10 + \frac{1}{2} \times - 5 \times 100 \\ = 200 + ( - 250) \\ = - 50 \: metres$