Question

7. Three masses are located in the x-y plane as follows a m), a mass of 4 kg is located at G m, 0 m, and a mass of 2 kg is losatoul at o (0 m, 0 3 m). Where is the center of mass of the system A) (I m, 2 m) D) (1 m, 0.5 m) E) (0.5 m, 1 m) B) (2 m. 1 m) C)(m m roblem 8 -11, consider the following scenario. A 20-kg ohject is raised vertically 10-meters above the ground. 8. What is the work done by the force of gravity A) 196 J B)-196 C) Zero D)98 8 9. If the object is released from rest 10 meters above the ground, what is the A) 14 m/s B) 196 m/s C)Zero D)9.8ms E It cansot be deternined 10. If the object is released from rest 10 meters above the ground, what is the object's speed at the instant before it hits the ground? object's kinetic energy when the object is 5 meters above the ground? A) 196 J B)-196J C) Zero D)98J 1)98 11. If the object is next moved horizontally 10 meters to the east, what is the work B)-196J C) Zero D98 B)-98 done by the force of gravity during the horizontal move? A) 196 J 12. In an elastic collision, which of the following are conserved? A) The total mechanical energy of the system B) The total linear momentum of the system C) The total energy of the system D) B and C E) All of the above 13. True or false. In an inelastie collision, the colliding objects are deformerd during the collision. A) True B) False

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Answer 1