- #1

Matty R

- 83

- 0

Hello.

I've been stuck on this question for ages, and was hoping someone could help me with it.

A stone is projected vertically upwards with a speed of 6m/s, and one second later a second stone is projected vertically upwards from the same point with the same speed.

Find where the two stones meet.

http://img193.imageshack.us/img193/4696/4bes.jpg

http://img195.imageshack.us/img195/908/4bp1.jpg

http://img140.imageshack.us/img140/1691/4bp2.jpg

http://img193.imageshack.us/img193/4383/4bp3.jpg

http://img148.imageshack.us/img148/6464/4bp4.jpg

As far as I can tell, I've worked out how high above the projection point the first stone is, when the second stone is launched.

I also worked out that the first stone is traveling at 4m/s at 1m above the ground after 1 second.

I tried doing this through trial and error, and came up with the collision at 0.15m above the projection point, 0.17 seconds after the second stone is launched, but I don't think that is the method I'm supposed to be using here. :shy:

I don't think I've ever done a question like this before, so I would really appreciate any help.

Thanks.

I've been stuck on this question for ages, and was hoping someone could help me with it.

## Homework Statement

A stone is projected vertically upwards with a speed of 6m/s, and one second later a second stone is projected vertically upwards from the same point with the same speed.

Find where the two stones meet.

## Homework Equations

http://img193.imageshack.us/img193/4696/4bes.jpg

## The Attempt at a Solution

http://img195.imageshack.us/img195/908/4bp1.jpg

http://img140.imageshack.us/img140/1691/4bp2.jpg

http://img193.imageshack.us/img193/4383/4bp3.jpg

http://img148.imageshack.us/img148/6464/4bp4.jpg

As far as I can tell, I've worked out how high above the projection point the first stone is, when the second stone is launched.

I also worked out that the first stone is traveling at 4m/s at 1m above the ground after 1 second.

I tried doing this through trial and error, and came up with the collision at 0.15m above the projection point, 0.17 seconds after the second stone is launched, but I don't think that is the method I'm supposed to be using here. :shy:

I don't think I've ever done a question like this before, so I would really appreciate any help.

Thanks.

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