Question

A object is thrown straight upwards with a speed of 19.6 m/sec. Three seconds later, its speed is:
Select one:
a. zero.
b. 9.8 m/sec downward.
c. 49 m/sec upward. Incorrect
d. 29.4 m/sec downward.

Answer 1

@bahrom7893

Answer 2

Vf = Vi+at = Vi+gt
Vf = 19.6 + (-9.81)*3 = -9.83 => 9.8 down

Answer 3

\[v=u+at\]

Answer 4

Since it is thrown a=-g

Answer 5

wait i know its not cso would it be a?

Answer 6

it's b

Answer 7

why?