Question

G
An object is thrown vertically upwords
and rises to a height of 10m. calculate
ethe Velocity with which the object was
thrown upwords
A. 14 m/s
B. 12 m/s
C 8 m/s
D. 18 m/s​

Answer 1

Answer:

(A) 14 m/s

Explanation:

Given:

v (final velocity) = 0 m/s

s (displacement) = 10m

a (acceleration) = -9.8 m/s²  (g)

(as the object is decelerating, we will take the acceleration as a negative value)

To find:

u (initial velocity)

Formula:

v² = u² + 2as

0 = u² + (2*-9.8*10)

⇒ 0 = u² - 196

⇒ u² = 196

⇒ u = √196 = 14 m/s

Hence, the object was thrown upwards with a velocity of 14 m/s.