Answers by visitors named: Arsh

You use the equation Vf^2 = Vi^2 + 2ad to solve for acceleration. Vi = 25; Vf = 0 (because it "slows to rest"). When you do that acceleration should come out to be 5 m/s^2. Now use the F=ma formula and plug in 15N for force and 5 m/s^2 for acceleration. Your mass should be 3kg. You're Welcome. :)

22/05/2010

interval

6,7,8

2.32 g