In which situation is there at least one force that does non-zero work? (i) (A)
ID: 1912169 • Letter: I
Question
In which situation is there at least one force that does non-zero work? (i) (A) A block slides down a slope at constant speed. (B) A satellite orbits the earth in a circular path. (C) A block sits at rest on a (vertical) spring. (ii) In the diagram, m2 > m1, and both masses are pulled to the right at the same constant velocity for a distance d. mK is the same for both masses. Evaluate the following statements (T/F/N). Explain your reasoning. ?????(A) The magnitude of the negative work done on mass 2 could be equal to the magnitude of the negative work done on mass 1. mK mK (B) The work done by the pulling force (F) on mass 1 is the same as the work done by mass 1 on mass 2. (C) The net work done on each mass is the same.
Explanation / Answer
(C) gravitational force (A) yes if and only if m1 = m2 otherwise no (B) no (C) yes if and only if m1 = m2 otherwise no