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Please answer the following questions. Each question is worth 1 point. There is no partial credit. 1. If the scalar (dot) product of two vectors is negative, it means that a. there was a calculator error. b. the angle between the vectors is less than 90 degrees. c, the angle between the vectors is 90 degrees. d. the angle between the vectors is greater than 270 degrees. e- the angle between the vectors is between 90 and 180 degrees 2. A 5.0 kg object is pulled along a horizontal surface at a constant speed by a 15-N force acting 20 a above the horizontal. How much work is done by this force as the object moves 6.o m? a.. 78 J b. 82 J c, 85 J d. 74 J e. 43 J 3. When a ball rises vertically to a height h and returns to its original point of projection, the work done by the gravitational force is b. mgh C. +mgh. d. 2mgh. e. +2mgh. carts and B have equal masses and travel e distances D on side-by-side straight A frictionless tracks while a constant force acts on A and a constant force 2F acts on B. Both ca start from rest. The velocities vA and vB F distance related by of the bodies at the end of D are VA VB 2 vA 2 vA 4 vA VB VA 2vB Please fast it is test
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