EAMCET Engineering 2010 Solved Paper

Ball falls from height h then formula for height covered by it in nth rebound is given by
hn=he2n
where e= coefficient of restitution
n= number of rebound
Total distance travelled by particle before rebounding has stopped.
H‌=h+2h1+2h2+2hn+...
H‌=h+2he2+2he4+2he6+2he8+...
‌=h+2h(e2+e4+e6+e8+...)
‌=h+2h[‌

e2

1−e2

]
‌=h[1+‌

2e2

1−e2

]
‌=h[‌

1+e2

1−e2

]