# The Naked Scientists Forum

### Author Topic: Newtons's 3rd law question  (Read 1666 times)

#### HerrPi

• First timers
• Posts: 1
##### Newtons's 3rd law question
« on: 17/11/2008 17:07:54 »
Suppose that 2 Sumo wrestlers are squaring off.  The stronger is pushing on the weaker and is accelerating the weaker wrestler backward.  My question is why does the weaker wrestler accelerate backward if he, by Newton's 3rd law, is pushing back onto the stronger wrestler with equal and opposite force as the stronger wrestler?

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#### Soul Surfer

• Neilep Level Member
• Posts: 3345
• keep banging the rocks together
##### Newtons's 3rd law question
« Reply #1 on: 17/11/2008 19:03:27 »
the stronger IS subject to equal and opposite forces the difference in result is likely to be the relative balance positions or weight of the two wrestlers.

#### lyner

• Guest
##### Newtons's 3rd law question
« Reply #2 on: 18/11/2008 09:53:31 »
If they are both on ice, they will both travel backwards - the lighter one will move back faster.
Momentum is conserved.
Mass times velocity in each direction are the same.

#### The Naked Scientists Forum

##### Newtons's 3rd law question
« Reply #2 on: 18/11/2008 09:53:31 »