Answer:
4.4 m/s
Explanation:
v² = v₀² + 2a(y − y₀)
(0 m/s)² = v₀² + 2(-9.8 m/s²)(0.99 m − 0 m)
v₀ = 4.4 m/s
Answer:
[tex]v_i = 4.4m/s[/tex]
Explanation:
As we know by the kinematics that final speed of the ball after it rebound will be zero as the ball will decelerate due to gravity.
here the displacement of the ball upwards is given as 0.99 m
so we will have
[tex]v_f^2 - v_i^2 = 2 a s[/tex]
now we have
[tex]0 - v_i^2 = 2(-9.81)(0.99)[/tex]
[tex]v_i^2 = 19.4[/tex]
now by solving it we will have
[tex]v_i = 4.4m/s[/tex]
