Question

help me to solve this question

Answer 1

do you want solution or concept

Answer 2

concept

Answer 3

i will tell you concept

Answer 4

you know kinetic energy changes to quater means its velocity change to 1/2 of intial

Answer 5

on droping ftom H height on reaching ground its speed will be [2gH]^1/2

Answer 6

what time ball take to come at rest

Answer 7

i telling you concept if you need ans i will tell you

Answer 8

4[2g/H]^1/2

Answer 9

\(\color{red}{mgH} \to \dfrac{1}{2} m v^2\to \dfrac{1}{4}*\dfrac{1}{2} m v^2\to \color{red}{\dfrac{mgH}{4}} \)

\(H \to \dfrac{H}{4} \to \dfrac{H}{16}\)

@osprey is right on this. classically, it will never come to rest.