4. The potential energy of a point mass 1 kg at a distance 0.6 m from the center of a solid sphere with the radius 1 m and the mass 2 kg is (G is the gravitational constant) (A) -2.24G J (B) -1.64G J (C) -0.8G J (D) -2.64G J (E) -1.12G J

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

4. The potential energy of a point mass 1 kg at a distance 0.6 m from the center of a solid sphere with the radius 1 m and the mass 2 kg is (G is the gravitational constant)
(A) -2.24G J
(B) -1.64G J
(C) -0.8G J
(D) -2.64G J
(E) -1.12G J

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