PROBLEMS 1. A med tech student pushes a 30-kg carton of books across the floor of her dormitory by exerting a constant force of 185 N at an angle of 37° with the horizon. If the opposing force of friction is 70 N, how much work does she do as she moves the carton 4 m in 15 s? What power in watts has she expended?

Physics for Scientists and Engineers: Foundations and Connections
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Author:Katz, Debora M.
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Chapter9: Energy In Nonisolated Systems
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2. A patient doing the triceps dip exercise weighs 700 N exclusive of the arms (Fig. 6-3).
During the first 25.0 cm of the lift, each arm exerts an upward force of 355 N. If the
upward movements starts from rest, what is the patient's velocity at this point?
(Precaution: If a patient is prone to anterior subluxation or dislocation, this
activity should not be done.)
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Fig. 6-3
Transcribed Image Text:I i I I 2. A patient doing the triceps dip exercise weighs 700 N exclusive of the arms (Fig. 6-3). During the first 25.0 cm of the lift, each arm exerts an upward force of 355 N. If the upward movements starts from rest, what is the patient's velocity at this point? (Precaution: If a patient is prone to anterior subluxation or dislocation, this activity should not be done.) 1 | Fig. 6-3
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PROBLEMS
1. A med tech student pushes a 30-kg carton of books across the floor of her dormitory by
exerting a constant force of 185 N at an angle of 37° with the horizon. If the opposing force of
friction is 70 N, how much work does she do as she moves the carton 4 m in 15 s? What
power in watts has she expended?
Transcribed Image Text:Name: PROBLEMS 1. A med tech student pushes a 30-kg carton of books across the floor of her dormitory by exerting a constant force of 185 N at an angle of 37° with the horizon. If the opposing force of friction is 70 N, how much work does she do as she moves the carton 4 m in 15 s? What power in watts has she expended?
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