1. The problem statement, all variables and given/known data Two rubber bands stretched to the standard length cause an object to accelerate at 2 m/s^2. Suppose another object with twice the mass is pulled by four rubber bands stretched to the standard length. The acceleration of this second object is: ?? The correct answer is 2m/s^2. 2. Relevant equations F = ma a = F/m 3. The attempt at a solution a = F/m Therefore, a is inversely proportional to m. a1/a2 = m2/m1 Second mass is twice the first mass. a1/a2 = 2m/m m's cancel out, leaving: a1/a2 =2 Isolate a2: a2 = a1/2 That would make my acceleration of the second object 1 m/s^2, not 2 m/s^2. Did I miss something?