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An elevator of mass M is pulled upwards by a cable; the elevator has a positive, but decreasing, velocity. What is the tension in the cable (neglecting the mass of the cable)? A.less than zero B.between zero and Mg C.equal to Mg D.greater than Mg E.zero 9. A box is being pushed by a constant force along a horizontal surface. If the object's velocity is constant, we can infer that there is _acting on the box A.a frictional force B.a net downward force C.no frictional force D.a net force upward E.a net force in the acceleration direction 10. Why is it so much more difficult to get a heavy table to start moving, than it is to keep it moving? A.the normal force is greater for objects at rest B.usuk E.HS = 0 11. (Honors) A system of two blocks is accelerated by an applied force of magnitude F on the frictionless horizontal surface. The tension in the string between the blocks is: A. 3F B. 5F C. 3/8 F 3 kg 5 kg D. 1/3 F E. 1/5 F Open-Ended 1) Pulling up on a rope, you lift a 4.25 kg bucket of water from a well with an acceleration of 1.8m/s^2. What is the tension of the rope? 2) Joe wishes to hang a sign that has a mass of 76.5kg so that cable A, attached to the store, makes a 30 degree angle. Cable B is horizontal and attached to an adjoining building. What is the tension in cable B? 3) A child's swing is held up by two ropes tied to a tree branch that hangs 13 degrees from the horizontal. If the tension in each rope is 2.28N, what is the mass of the swing