How Do Newton's Third Law and Force Calculations Apply to Hockey Players on Ice?

[VidsEpic]

Homework Statement

two hockey players are standing on ice. Player A is 100kg and player B is 112kg, Player A pushes B with 40N and player B pushes A with 50N.

what are the action/reaction forces?
what are the accelerations?

Homework Equations

F = ma

The Attempt at a Solution

player A has a force of 50N on him plus the reaction from his own force of 40N making 90N left

90N on each player in opposite directions, 90/100 = 0.9 m/s^2 and 90 /112 = 0.8 m/s ^2 in other direcctionPlease help me!

 

[mfb]

Homework Statement

two hockey players are standing on ice. Player A is 100kg and player B is 112kg, Player A pushes B with 40N and player B pushes A with 50N.

what are the action/reaction forces?
what are the accelerations?

Homework Equations

F = ma

The Attempt at a Solution

player A has a force of 50N on him plus the reaction from his own force of 40N making 90N left

90N on each player in opposite directions, 90/100 = 0.9 m/s^2 and 90 /112 = 0.8 m/s ^2 in other direcction


Please help me!

Looks fine.
Where do you need help?

 

[VidsEpic]

Is this correct?

 

[VidsEpic]

The diagram looks like this:http://i.imgur.com/LP6NfNw.jpgsome people are telling me that it is 10N left on the 100kg object?

Is it correct that I consider on each object the force of its own reaction + the force applied to it so that on 100kg I have 90N left and on 112kg I have 90N right?

 

[mfb]

Is it correct that I consider on each object the force of its own reaction + the force applied to it so that on 100kg I have 90N left and on 112kg I have 90N right?

I would interpret the problem statement in that way, yes.

Please don't write PMs related to homework threads, they are just annoying.

 

[Andrew Mason]

Homework Statement

two hockey players are standing on ice. Player A is 100kg and player B is 112kg, Player A pushes B with 40N and player B pushes A with 50N.

This is a poor question, in my view. What does it mean that A applies 40 N of force to B and B applies 50 N to A? How? They will always apply the same magnitude of force to each other - even if one pushes harder than the other.

AM

 

[ehild]

The players are extended bodies, and push each other at different points. See picture.

ehild

 

[Andrew Mason]

The players are extended bodies, and push each other at different points. See picture.

ehild

Ok. But that does not mean that they push each other with different magnitudes of force.

An astronaut in space may push off with his legs against one end of the spaceship with 100 N force. But that does not mean that the spaceship applies 0 force to the astronaut. On the contrary, the spaceship applies 100N of force to the astronaut. There is no difference between "apply" and "push" here.

AM