KEY N. s or newton second 2 or FORCE = MASS times ACCELERATION 1 or "the law of inertia" 3 or “for every action, there is an equal and opposite reaction” F = ma, 4 = m*10, m = 0.4 kg F = ma, F = 0.6*9.3, F = 5.58 N Air resistance B Velocity indicates direction/speed is the absolute value of velocity vf2 = vi2 + 2ax, vf2 = 0 + 2*9.8*8, vf = 12.522 m/s vf = vi + at, vf = 7 + 5*3, vf = 22 m/s C KE = 0.5mv2, KE = 0.5*5*32, KE = 22.5 J m1v1 = m2v2 , 0.2*5 = m2*7, m2 = 0.143 kg D 50 = 0.5*20*v2, v = 2.236 m/s C C A B D C B D G A C F B E Tiebreakers: in order, 10, 18, 16 (additional questions may have been randomly selected to use as tiebreakers)
KEY N. s or newton second 2 or FORCE = MASS times ACCELERATION 1 or "the law of inertia" 3 or “for every action, there is an equal and opposite reaction” F = ma, 4 = m*10, m = 0.4 kg F = ma, F = 0.6*9.3, F = 5.58 N Air resistance B Velocity indicates direction/speed is the absolute value of velocity vf2 = vi2 + 2ax, vf2 = 0 + 2*9.8*8, vf = 12.522 m/s vf = vi + at, vf = 7 + 5*3, vf = 22 m/s C KE = 0.5mv2, KE = 0.5*5*32, KE = 22.5 J m1v1 = m2v2 , 0.2*5 = m2*7, m2 = 0.143 kg D 50 = 0.5*20*v2, v = 2.236 m/s C C A B D C B D G A C F B E Tiebreakers: in order, 10, 18, 16 (additional questions may have been randomly selected to use as tiebreakers)
hovercraft_2017_b_gopher_key.docx