6. A comet moves in an elongated elliptical orbit around the sun. At perihelion, the comet is 8.75×10⁷ km from the Sun with the speed 5.5×10⁴ m/sec. At aphelion, it is 5.26×10⁹ km from the sun. The period of the orbit is (A) 64 years (B) 68 years (C) 78 years (D) 75 years (E) 52 years

5. Two blocks are at rest on a frictionless, level table. Both blocks have the same mass m, connected by a spring of negligible mass. The separation distance when the spring is relaxed is L. During a time interval Δt, a constant force F is applied horizontally to the left block, moving it through a distance x₁. The right block moves through a distance x₂. When the force F is removed, what is the total energy of the system associated with vibration relative to its center of mass? (A) (B) (C) (D)(E) It cannot be determined

6. A comet moves in an elongated elliptical orbit around the sun. At perihelion, the comet is 8.75×10⁷ km from the Sun with the speed 5.5×10⁴ m/sec. At aphelion, it is 5.26×10⁹ km from the sun. The period of the orbit is
(A) 64 years
(B) 68 years
(C) 78 years
(D) 75 years
(E) 52 years

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