Question

a ball is released from a height and it reaches the ground in 3 second. if the speed of the ball is 30 m/s. what is its initial and final velocity.​

Answer 1

Answer:

গলফ ফিরে যেতে য়ের প্রজননতন্ত্র আঁকলা কেন জানি সেই সাথে কথা বলে মনে হচ্ছে তার সাথে

Answer 2

Explanation:

Given,

u=0m/s

t=3sec

g=9.8m/s

2

From 1st equation of motion,

v=u+gt

v=0+9.8×3

v=29.4m/s

From 3rd equation of motion,

2gh=v

2

−u

2

h=

2g

v

2

−u

2

h=

2×9.8

29.4×29.4−0

2

h=44.1m

Height is 44.1m.