A helicopter is holding a 5,000-N bridge section 100m over the spot where it is going to be placed, but the helicopter is slightly off. How much force must the spotter on the ground apply to the bridge section to move it 1m into the proper position?
(A) 500 N
(B) 50 N
(C) 5 N
(D) 490 N
(E) 4.9 N
tension about 5000 N
sin theta about 0.01
so about 50 N