According to Newton's Second Law of Motion, the force acting on an object varies directly with the object's acceleration. Suppose that a force of 81n results in an acceleration of 9m/s2 . If the object's acceleration becomes 8m/s2 , what is the force?

Question

anonymous · Answer

$$F = ma$$
you could find the mas of the object using the first set of data (81N, 9m/s2)
After you find the mass, you can use that withe 8m/s2 to find the force acting on it..

anonymous · Answer

F=net Force
m=mass
a=acceleration

precal · Answer

http://ed.ted.com/lessons/joshua-manley-newton-s-3-laws-with-a-bicycle good video about Newton's three laws of motion