Homework Help: physics

Posted by pat on Tuesday, November 10, 2009 at 9:24pm.

1) Two boxes are placed are placed side by side on a frictionless surface so that they touch each other. Box A has a mass of 4 kg. Box B has a mass of 12 kg. A constant force of 24 N is applied to box A. What force does box A exert on box B?

physics - Mia, Tuesday, November 10, 2009 at 9:29pm
Box A exerts onto force b its acceleration as a force;

So F=ma
where 24=(12+4)a Then solve for a
a=1.5

Then the force that box a exerts on box b is
F=ma
=12*1.5
=18N
physics - bobpursley, Wednesday, November 11, 2009 at 3:40am
Good work.

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