Question

Not in options...

Answer 1

Two balls, A and B having masses 50 g and 75 g respectively were moving in opposite directions. When they collided, their speeds were ‘v’ and 12 m/s respectively. After collision both of them came to rest. What is the value of ‘v’?

Answer 2

@Xishem and @mukushla @experimentX

Answer 3

@hartnn and @UnkleRhaukus

Answer 4

http://www.wolframalpha.com/input/?i=50*x%2B75*12%3D0

Answer 5

hmn but that is nt in Options this time

Answer 6

I am just confused and I think that there is a fault in my process since this time my answer is not in options ..

Answer 7

what are your options?

Answer 8

wait u say that the answer is 18 m/s ?

Answer 9

sorry -18 m/s ?

Answer 10

-90/5

Answer 11

your last step @mathslover

Answer 12

Oh k so the answer is \(\huge{-18ms^{-1}}\) ?

Answer 13

if the rest of your working is right

Answer 14

right... options are


1. 18 m/s
2. 8 m/s
3. 9 m/s
4. 4 m/s

Answer 15

"-----" we can not neglect this

Answer 16

yes probably ,,,, if it's speed

Answer 17

u r trying to say that we can neglect - sign since we have to calculate speed? and speed is a scalar quantity?

Answer 18

Done,I got the answer

Answer 19

yep

Answer 20

In the end it should be:
0.075*12=0.50v
v=0.9/0.50=18m/s
So where's the problem :o

Answer 21

Oh k ... |-18| = 18

Answer 22

thanks a lot @experimentX @UnkleRhaukus and @DLS

i got it now

Answer 23

:))