Force exerted by one object on another?

[aishax]

What force does the 4.0 kg object exert on the 10 kg object when the two are moving together?

Ofcourse, I know I did not put the previous, required information in order to solve this question. I would like to know in general how to find the magnitude of force one object exerts on another in this type of situation. Any help is greatly appreciated :)

 

[kjohnson]

I assume they mean the force of gravity between them:

F=(G(m1)(m2))/r^2

That will be the magnitude of the force between the two objects where 'G' is the gravitational constant (i believe 6.67E-11) and 'm1'&'m2' are the mass of the two objects and 'r' is the distance between them.

 

[fizzynoob]

no I think he means contact forces.

You sum the forces in each direction, then solving for the force that you wish to find. Draw a Force Diagram

 

[kjohnson]

no I think he means contact forces.

You sum the forces in each direction, then solving for the force that you wish to find. Draw a Force Diagram

Ah yes, that makes sense...i guess i assumed the two masses were some distance apart and moving towards each other, but instead they are touching and moving in unison. Good call.

 

[venkatg]

zero.

If the two are moving together there is force between them