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Elevator
Velocity
B
A
2 Box A of mass m sits on the floor of an elevator, with box B of mass 2m on top of it, as show
in the figure. The elevator is moving upwards and slowing down., FA is the magnitude of the
force exerted on the box A by box B, FB is the magnitude of the force exerted on box B by
box A, and F, is the magnitude of the gravitational force exerted on box B. Which of the
following ranks the forces in order of increasing magnitude?
A FB = FA = Fg
B
(FB=FA)
C FB < (FA= Fg)
D FA< FB
Sagot :
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