Calculation

Crowley

Not Aleister

General

27 Sep 05

Crowley

Not Aleister

Control room

Joined: 17 Apr 02
Moves: 91813

27 Sep 05

Any math wizards out there?
I have soething I have to calculate. It's a type of motion equation, but I don't have the acceleration or time values, so the normal motion equations won't work.

A moving object strikes a static object.

I know the following values:
Displacement.
Final velocity.
Weights of the objects.

I need to find the Initial Velocity.

Does anyone know a formula to use here?

adramforall

THORNINYOURSIDE

Joined: 04 Sep 04
Moves: 245624

27 Sep 05

Originally posted by Crowley
Any math wizards out there?
I have soething I have to calculate. It's a type of motion equation, but I don't have the acceleration or time values, so the normal motion equations won't work.

A moving object strikes a static object.

I know the following values:
Displacement.
Final velocity.
Weights of the objects.

I need to find the Initial Velocity.

Does anyone know a formula to use here?

Don't have the formula but the answer is 28.

PocketKings

Banned from edits

Grammar dyslexic

Joined: 20 May 05
Moves: 11372

27 Sep 05

Thats a physics problem. I had that about 10 years ago in high school. I don't remember the exact equation, but its not a hard one. but i'm sure you could find a site that has a list of equations where u can just plug your numbers in

sonhouse

Fast and Curious

slatington, pa, usa

Joined: 28 Dec 04
Moves: 53416

27 Sep 05

Originally posted by adramforall
Don't have the formula but the answer is 28.

Just remember, KE (kinetic energy) = M(mass) times V^2
(velocity squared)
so the before should equal the after. If a 1 pound ball doing
1 foot per second whacks a 0.1 pound ball the 0.1 guy should
go off at 10 f/s. Something like that.
so it would be KE1=KE2 Maybe that helps?
I don't want to do your homework for you, you have to work out
SOMETHING for yourself.

dottewell

Joined: 12 Jun 05
Moves: 14671

27 Sep 05

Think of a number between 1 and 99.

Multiply it by 3, add 15, then subtract twice the number you were thinking of.

The answer is always elephant.

Ragnorak

For RHP addons...

tinyurl.com/yssp6g

Joined: 16 Mar 04
Moves: 15013

27 Sep 05

Originally posted by Crowley
Any math wizards out there?
I have soething I have to calculate. It's a type of motion equation, but I don't have the acceleration or time values, so the normal motion equations won't work.

A moving object strikes a static object.

I know the following values:
Displacement.
Final velocity.
Weights of the objects.

I need to find the Initial Velocity.

Does anyone know a formula to use here?

What type of objects are they? If they aren't balls, then you're going to have to take in the friction rating of the surface across which they move as well. Maybe.

D

knightwest

General of GROSS

Calvin's Treehouse

Joined: 28 Sep 04
Moves: 9861

27 Sep 05

I bet you're thinking asking here was a waste of time

dottewell

Joined: 12 Jun 05
Moves: 14671

27 Sep 05

Originally posted by knightwest
I bet you're thinking asking here was a waste of time

Why? It's the usual combination of helpful answers and modestly diverting rubbish.

PocketKings

Banned from edits

Grammar dyslexic

Joined: 20 May 05
Moves: 11372

27 Sep 05

Originally posted by Ragnorak
What type of objects are they? If they aren't balls, then you're going to have to take in the friction rating of the surface across which they move as well. Maybe.

D

where did you find the dancing hasselhof. cracks me up everytime i see it?

Crowley

Not Aleister

Control room

Joined: 17 Apr 02
Moves: 91813

27 Sep 05

OK. It was accident.
A motorbike hit a pedestrian, I want to know how fast the bastard was going.

I have the weight of the pedestrian and the bike and I have the displacement of the pedestrian.

What formula can I use?

DOlivier2004

A Lost Bobby

The Bermuda Triangle

Joined: 11 Sep 04
Moves: 7865

27 Sep 05

I don't want to do your homework for you, you have to work out
SOMETHING for yourself.

What makes you think he's a student when his profile clearly indicates that he isn't? He's asking for help

(too bad I don't know the formula details, else I'd respond)

Ragnorak

For RHP addons...

tinyurl.com/yssp6g

Joined: 16 Mar 04
Moves: 15013

27 Sep 05

Originally posted by Crowley
OK. It was accident.
A motorbike hit a pedestrian, I want to know how fast the bastard was going.

I have the weight of the pedestrian and the bike and I have the displacement of the pedestrian.

What formula can I use?

I've a feeling you'd get a better response if you posted this in the Posers forum.

D

Crowley

Not Aleister

Control room

Joined: 17 Apr 02
Moves: 91813

27 Sep 05

Originally posted by Ragnorak
I've a feeling you'd get a better response if you posted this in the Posers forum.

D

True.

eldragonfly

leperchaun messiah

thru a glass onion

Joined: 19 Apr 03
Moves: 16870

27 Sep 05

Originally posted by Crowley
OK. It was accident.
A motorbike hit a pedestrian, I want to know how fast the bastard was going.

I have the weight of the pedestrian and the bike and I have the displacement of the pedestrian.

What formula can I use?

There really is no accurate way to determine that. Law enforcement agencies and accident lawyers would be the first place to ask.

AThousandYoung

Fat cat came to play

tinyurl.com/2n686uzs

Joined: 23 Aug 04
Moves: 27549

27 Sep 05

I responded in the Posers and Puzzles thread.

http://www.redhotpawn.com/board/showthread.php?threadid=30264&page=1#post_472573