PHYSICS
posted by samir on .
pete and john play a game of tug f war on a frictionless icy curface. pete weighs 539 N and john weights 392 N. during the course of the game, john accelerates toward pete at a rate of 3 m/s^2
a)what's the magnitude of the force that peter exerts on john?
b)what's the magnitude of pete's acceleration toward john?
I am not sure what formula to use, pleaase help!

The center of mass will remain in the same place in this frictionless situation
a) Use F = ma
Solve for the F
b) Also use F = ma on Pete, with the same F, and solve for a(of Pete).
The F will be the same on both, but in opposite directions. 
While John is traveling along an interstate
highway, he notices a 160 mi marker as he
passes through town. Later John passes a
108 mi marker.
What is the distance between town and
Johnâ€™s current location?
Answer in units of mi