3rd Form Honors Physics 1 Quiz 82 NAME:____________________ Number___ 1. _______________________________ 1. What is the more common word for the “magnitude of the velocity vector”? 2. _______________________________ 2. One metal sphere has a charge of +3 C. A second metal sphere has a charge of -2 C. The spheres are touched together. What is the charge residing on the two spheres while they are in contact? 3. _______________________________ 3. A planet’s orbit about a sun is elliptical. Consider a system consisting of just the planet. Is the planet’s angular momentum about the sun conserved? 4. _______________________________ 4. An object is hung from a spring scale, which reads 2.0 N. Dividing by 10, it’s determined that the object’s mass is 0.2 kg. Which kind of mass was determined? 5. _______________________________ 5. An object is pulled at constant speed to the right by a rope, which is angled 30o above horizontal. The tension in the rope is 5.0 N. Is the force of friction greater than, less than, or equal to 5.0 N? 6. _______________________________ 6. An object is attached to a horizontal spring, compressing the spring by 0.15 m. A second object, twice as massive as the first, compresses the same spring by 0.15 m. By how much has the potential energy of the spring-object system changed?