Question

. If a ball is thrown vertically upwards with 40 m/s its velocity after 2 sec. will be - *
(a) 10 m/s
(b) 30 m/s
(c) 20 m/s
(d) 40 m/s​

Answer 1

$v \: = u \: + \: at$

v = 40 - 10 × 2

$v \: = 40 - 20$

v = 20 m / s