1. The problem statement, all variables and given/known data I need to know the force of a falling object. m=1.502 kg v=0.528 m/s (this value is way off from the theoretical which is .9598 m/s) Duration of impact = 0.167 s I have all the variable but my problem is this: This falling object compresses a spring which needs a force of 21 N to compress. From my experiment, the spring compresses but the calculation doesn't work out. This could be just experimental error but I don't think the margin of error should be this big. 2. Relevant equations F=m∆V/∆t 3. The attempt at a solution F=((1.5025)(0-0.528))/0.167 F=4.75 N [down] F=ma F_g=(1.5025)(9.8) F_g=14.7245 N [down] F_e=kx F_e=(512)(0.041) F_e=20.992 N [up] I was also wondering if you add the two downward forces together. If that is true, then the force using my theoretical value would be correct.