If you accidentally ran out 10ft onto an extremely slick frozen pond, you may not be able to walk back because the relative absence of friction. Fortunately, you have a HUGE bag of pennies with you. Using Newtons 3rd Law, explain what you can do to get back.
2007-03-02 04:49:37 · 12 answers · asked by FangZ 2 in Science & Mathematics ➔ Physics
For every action there is an equal and opposite reaction. Throw the pennies away from shore and use the opposite reaction to slide back to shore.
2007-03-02 04:54:19 · answer #1 · answered by science teacher 7 · 0⤊ 0⤋
Using Newton's 3rd law, you would throw the bag of pennies in an opposite direction that you intend to travel. For every action, there is an equal and opposite reaction.
Thus, you could calculate the differential of weight between you and the bag of pennies. This would allow you to then calculate the total distance you must throw the bag to cause your mass to travel 10 feet in the opposite direction. Inertia would affect such calculations, but, as you've already stated, the 'extremely slick frozen pond' has rendered the effect of inertia nil.
2007-03-02 05:01:01 · answer #2 · answered by Quinton1969 3 · 0⤊ 0⤋
Third Law states that if A exerts a force on B, then B simultaneously exerts a force on A with the same magnitude and in the opposite direction.
The pennies have a raised rim and raised relief. If pennies are scattered on the ice where you plan to take a step, then the following should happen: As your weight (force) is tranferred onto the penny, that force will be translated to the ice over a much smaller area (relief of the coin), making the pressure on the ice very great over that focused area, and causing it to transiently melt and "dig in" to the ice. Scattering a path as you go will allow to to continue to step in whatever direction you wish, so long as you can place pennies in your path.
2007-03-02 04:58:35 · answer #3 · answered by Jerry P 6 · 0⤊ 0⤋
Well you could offer someone the huge bag of pennies if they help you get back and throw you a rope. Wait, what are you doing on a frozen pond with a bag of pennies anyways.
realistically I would use motion and force and swing the pennies in a motion as to carry me towards shore.
2007-03-02 04:55:07 · answer #4 · answered by Kevin M 3 · 0⤊ 0⤋
Newton's 3rd Law: "All forces occur in pairs, and these two forces are equal in magnitude and opposite in direction."
You could set the bag of pennies on the ice, and push against it. (You could also throw the pennies, but pushing off would make it easier to maximize the force you apply.) Newton's 3rd law states that the bag of pennies will actually exert a force on you as well, causing you to accelerate and hopefully reach the edge of the pond.
2007-03-02 05:02:07 · answer #5 · answered by Ben H 4 · 0⤊ 0⤋
Swim, because the weight of the huge bag of coins would have broken the ice when you stopped sliding out.
If the ice doesn't break, then fasten your school tie to the bag of coins, throw it towards the centre of the pond and you may get enough impulse in the opposite direction ie towards the shore, to get you back to safety. If you hold on to the tie, you will of course jerk to a stop when the bag of coins reaches the limit of its travel, but you can repeat the action a few thousand times and maybe you will get back. The effort will keep you warm anyway and your mind off your fate if the ice does eventually break while you are holding on to your school tie and the bag of coins
2007-03-02 04:53:43 · answer #6 · answered by cornettofile 1 · 1⤊ 0⤋
If the bag is heavy enough and you push it away from you and the edge, by Newtons 3rd Law (every action has an equal and opposite reaction) you would slide towards the edge.
2007-03-02 05:02:06 · answer #7 · answered by SLH 4 · 0⤊ 0⤋
throw the bag filled with penny in forward direction with a force of 10 dyne which will cause a relative backward motion and u will get back
2007-03-02 04:54:10 · answer #8 · answered by aaryan 2 · 0⤊ 0⤋
place some pennies on your path to return back,stand on them and push them in opposite direction with your foot , according to Newton's 3rd law you will move then pick up those pennies and repeat till you return safely After that give those pennies to some Charity fund. to save more lives.
2007-03-02 06:21:35 · answer #9 · answered by ukmudgal 6 · 0⤊ 0⤋
throw the pennies in the opposite direction you want to go.
how would you "accidently" run out onto a slick frozen pond anyway?
2007-03-02 04:52:23 · answer #10 · answered by AATM 2 · 1⤊ 0⤋