write one word answer the black sea is an example of this
Answers
Answer:
a sea shaped like a lake
Explanation:
ok bro byeeeee
Answer:
i) Initial velocity is 19.6 m/s.
(ii) Time taken is 2 seconds.
Explanation:
Given,
Height/Distance, s is 19.6 m.
Final velocity, v is 0 m/s.
Acceleration due to gravity, g or a is 9.8 m/s or a = -9.8 m/s [Upward].
(i) We know,
Third equation of motion :
• v² = u² + 2as
[Where, v is final velocity, u is initial velocity, a is acceleration and s is distance/displacement].
Put all values:
\longrightarrow⟶ (0)² = (u)² + 2 × (-9.8) × 19.6
\longrightarrow⟶ 0 = u² - 19.6 × 19.6
\longrightarrow⟶ 0 = u² - (19.6)²
\longrightarrow⟶ (19.6)² = u²
• Square root both side
\longrightarrow⟶ √(19.6)² = √u²
\longrightarrow⟶ u = 19.6
Thus,
Initial velocity of the ball is 19.6 m/s .
(ii) We know,
First equation of motion
• v = u + at
[Where, t is time]
Put all values :
\longrightarrow⟶ (0) = 19.6 + (-9.8) × t
\longrightarrow⟶ 0 - 19.6 = -9.8 × t
\longrightarrow⟶ (-19.6)/(-9.8) = t
\longrightarrow⟶ t = 2
Thus,
Time taken by the ball to reach the maximum height is 2 seconds.