If you lift a 80 N book 50 cm off the floor, how much work did you do? 1. 0

2. 4000 J

3. 40 J

4. 1.6 J

A man pushes a couch a distance of 0.75 m. If 450 J of work is done, what is the magnitude of the force applied?

1. 16.9 J

2. 45

3. 1350 J

4. 2700 J

4000j

Explanation:

b mirrors submit a iisner? e. for which optical devices does d sometimes have a positive value? o a a and b o b. a and c o c. b and d 0 d. b and cb

c because the action was the roller coaster reaches bottom of hill (action) reaction would be blood tends to drain away from head

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