Friday

January 30, 2015

January 30, 2015

Posted by **lisa** on Tuesday, January 13, 2009 at 8:03pm.

a) Find the height of the bounce if the ball is dropped from a height of 280cm

b) Find from waht height the ball was dropped if it bounces to a height of 120cm

Thanks in advance.

- math -
**Reiny**, Tuesday, January 13, 2009 at 10:42pmlet h be the new height, let x be the height it was dropped from, then

h = kx, where k is a constant

when x=20, h=16

so 16=k20

k = 16/20 = 4/5

then h =4x/5

a)when x= 280

h = 4(280)/5 = 224

b) when h = 120

120 = 4x/5

600 = 4x

x = 150

**Answer this Question**

**Related Questions**

calculus - A ball has bounce coefficient 0 < r < 1 if when it is dropped ...

science - Science Experiment Determine a mathematical modelwhich describes the ...

math - when a ball is dropped, it bounces back up 4/5 of the height from the ...

11 - A ball is dropped vertically from height of 30 meters after bounces.The ...

maths lit - a ball is dropped from a height of 2r1/3 meters. It bounces to 3/4 ...

Math - 3rd grade summer work - A Super-Duper ball bounces twice its height when ...

math - Fay's rubber ball bounces exactly half the height from which it is ...

physics - A 0.10 kilogram ball dropped vertically from a height of 1.0 meter ...

Physics - A ball is dropped from an undetermined height and bounces to 5 meters...

Geometric Series question? Help!? - A bouncy ball bounces to 2/3 of its height ...