Question

A body falling from a height of 10 m rebounds from a hard floor.It looses 20% of energy in the impact.What is the height to which it would rise after the impact?

a) 7 m

b) 5 m

c) 8 m

d) 6 m

Answer 1

@ParthKohli @hartnn @Algebraic! @.Sam. @maheshmeghwal9

Answer 2

@jhonyy9 @Jonask

Answer 3

isn't it as simple as 80% of 10 = 8 ?

Answer 4

how did you get 80%

Answer 5

lost 20% implies, remaining 80%

Answer 6

what is 80%

Answer 7

energy

Answer 8

m just using logic, no formula

Answer 9

but it also looses 20% energy

Answer 10

if the body wouldn't have lose the energy, it would have again rise upto 10m.
but since it has lost energy
therefore it would gain only (100-20)%=80% height if 10 m
& that is 8m.

Answer 11

i think @hartnn wants to say this statement:)

Answer 12

it looses 20% thats why it still has 80%
yes

Answer 13

if=of*

Answer 14

ok thnx... @maheshmeghwal9 nd @hartnn

Answer 15

:)

Answer 16

welcome ^_^