How does the acceleration of the bullet compare with the acceleration of the rifle?

Answer:
Both objects accelerate, however due to Newton's 2nd law the acceleration of the rifle is less due to it's higher mass.

Newton's second law F = ma

In your question the force (F) would be the same on both objects, but the mass (m) would be different and give a different answer for acceleration (a). This difference can be seen by looking at the effect of being on opposite sides of the rifle (ie kickback vs bullet hole)
First answer by RideX2. Last edit by AliceEvans1970. Contributor trust: 3 [recommend contributor recommended]. Question popularity: 3 [recommend question].