# A box is hanging by a very light string from a second box. Thesecond box is glued to the ceiling of a freight elevator. Both boxes have an inertia of…

A box is hanging by a very light string from a second box. Thesecond box is glued to the ceiling of a freight elevator. Both boxes have an inertia of 0.25kg. The elevator startsfrom rest, moving upward with a constant acceleration of 3.0m/s2.1

(a) Draw separate free-body diagrams for each of the two boxes, labelling the forces using the Ftypeby,onnotation introduced in the reading. Make sure the lengths of the force vectors are appropriate for themagnitudes of the forces. Below your diagram, give the magnitudes of as many forces as possible. Showhow you obtained these magnitudes.

(b) Assuming your system is the two boxes, what is the net work done on the system in the first 5s of the motion? What does work on the system, and what are the individual contributions to the work?(c)[4 pts] What is the net impulse delivered to the system over the first t = 5s of the motion?

(d) What is the instantaneous power delivered to the system due to the Earth at time t = 3s?

(e) What other objects would you need to draw free body diagrams for to include the force interaction pairs for the forces you drew in the free body diagrams above?

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