A stock person at the local grocery store has a job consisting of the following five segments:
(1) picking up boxes of tomatoes from the stockroom floor
(2) accelerating to a comfortable speed
(3) carrying the boxes to the tomato display at constant speed
(4) decelerating to a stop
(5) lowering the boxes slowly to the floor.
During which of the five segments of the job does the stock person do positive work on the boxes?
A) (1) and (5)
B) (1) only
C) (1), (2), (4), and (5)
D) (1) and (2)
E) (2) and (3)
Question 2
A person on a sled coasts down a hill and then goes over a slight rise with speed 2.7 m/s. The top of this rise can be modeled as a circle of radius 4.1 m.
The sled and occupant have a combined mass of 110 kg. If the coefficient of kinetic friction between the snow and the sled is 0.10, what friction force is exerted on the sled by the snow as the sled goes over the top of the rise?
What will be an ideal response?
The eight α-helical segments (shown here as cylinders) are labeled A through H
Mechanism of Action of Local Anesthetics
Techniques for applying local anesthesia: (a) topical; (b) nerve block; (c) infiltration; (d) ...
After multiple injections of a local anesthetic, the patient developed herpetic lesions.
Offshore spawning stock biomass, Grand Bank Atlantic Cod since the early 1980s