The 1560-kg solid steel door to a bank vault is 2.00 m high, 1.00-m wide and 10-cm thick. One hinge is 60.0 cm down from the top on the left-hand side of the door. The other hinge is 30.0 cm up from the bottom. What horizontal force, in what direction, does the door exert on the lower hinge?
A. 6950 N, left
B. 6950 N, right
C. 7640 N, left
D. 7640 N, right
E. 15,300 N, left
Answer: A
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