Three coplanar forces F1F_1F1, F2F_2F2, and F3F_3F3 act on a point object. Which combination of forces can never produce a resultant force of zero?
F1=5 N,F2=12 N,F3=13 NF_1 = 5\text{ N}, F_2 = 12\text{ N}, F_3 = 13\text{ N}F1=5 N,F2=12 N,F3=13 N
F1=4 N,F2=4 N,F3=9 NF_1 = 4\text{ N}, F_2 = 4\text{ N}, F_3 = 9\text{ N}F1=4 N,F2=4 N,F3=9 N
F1=7 N,F2=7 N,F3=7 NF_1 = 7\text{ N}, F_2 = 7\text{ N}, F_3 = 7\text{ N}F1=7 N,F2=7 N,F3=7 N
F1=3 N,F2=8 N,F3=10 NF_1 = 3\text{ N}, F_2 = 8\text{ N}, F_3 = 10\text{ N}F1=3 N,F2=8 N,F3=10 N
84 exam-style questions on AQA A Level Physics Force, energy and momentum, covering Scalars and vectors, Moments, Motion along a straight line, Projectile motion, Newton's laws of motion, Momentum, Work, energy and power, and Conservation of energy. Each one has a worked solution and a mark scheme showing where the marks go.