IMG_1986.JPG IMG_1988.JPG IMG_1989.JPG IMG_1990.JPG IMG_1991.JPG IMG_1992.JPG IMG_1993.JPG IMG_1994.JPGprogrammable) calculator for the exam. You must pass the
final exam to pass the course.
What does the symbol u stand for in the equation fru•F2?
A. the friction forces between the two objects
B. the roughness of the materials that the two objects are made of
C. the support force on the objects
D. the materials that the two objects are made of
2. What is the gravitational force between Mars and the sun?
A. 7.43 x 1030 N
B. 1.79 x 1026 N
C. 3.76 % 1032 N
D. 1.65 x 1021 N
3. You lift a small barbell over your head and hold it there as part of an exercise routine. While
holding the barbell over your head, do you
do
any
work?
A. no, because the barbell no longer moves
B. no, because you don’t need to apply any force to hold it there
C. yes, because you must apply force to hold the barbell there
D. yes, you must maintain the work it took to lift it there
Motion
Force
A 5 N force acts on an object as shown in the diagram:
4. How much work will the force do as the objects moves a distance of 4 m?
A. 0.8 J
B. OJ
C. 1.25 J
D. 20 J
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