Newton's Second Law of Motion is that the amount of mass and force on an object will depend on how fast the acceleration is. To solve problems of Newton's second law the equation for finding force is F= m*a, for finding mass it's F/a = m, and for finding acceleration it's F/m = a. If you put a lot of force on the object the acceleration of the object will get faster, but depending on the surface friction will slow it down until it stops. If you use the same amount of force again but on a heavier object the acceleration will be slower than when the object was easy to push since the mass is different.