Question

1. A ball weighing 250 gm is thrown vertically upwards with
a velocity of 980 cm/sec. The time that the ball will take to
return back to earth would be
(A) 1 sec
(B) 2 sec
(C) 3 sec
(D) 4 sec
(E) 5 sec.
plz.. tell me​

Answer 1

Answer:

2 sec

Explanation:

v = u + at

0 = 9.8 + (-9.8)t

t = 1 sec

total time = 2 * 1 = 2 sec