Q. A Ball is dropped from 8 m height.it rebounds to half the height when it hits the ground. What is the distance travelled by the ball before it hits the ground?

• distance travelled by the ball before coming to rest = 8+4+4+2+2+1+1+(1/2)+(1/2)+(1/4)+(1/4)+...upto infinity
  =8+2*[4+2+1+(1/2)+(1/4)+...]
  =8+2*[4/(1-1/2)]
  =8+2*8
  =24 m
• 11 years agoHelpfull: Yes(38) No(4)
• The ball will travel 8 M when it hit the ground first time.
  If u mean the total distance travelled by ball before coming to rest, then
  total distance = 8+4+4+2+2+1+1+.........= (8+4+2+1+..)+(4+2+1+...)= 16+8=24 M
• 11 years agoHelpfull: Yes(6) No(4)
• distance travelled by the ball = 8+4+2+1+(1/2)+(1/4)+(1/8)+...upto infinity
  series is a GP , a=8, r=1/2
  Sum, S=a/(1-r)=8/(1- 1/2)=8*2= 16 m
  ans 16 m
• 11 years agoHelpfull: Yes(5) No(21)
• 8m. in question we have to find the distance travelled before hits the ground...so ball is dropped and travel 8m distance .
  
• 8 years agoHelpfull: Yes(2) No(0)
• 8+4+4+2+2=20m is correct answer
• 10 years agoHelpfull: Yes(0) No(3)
• Plz explain right ans.
  
• 9 years agoHelpfull: Yes(0) No(0)