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Answer to Question #21054 in Mechanics | Relativity for johnny jackson
Question #21054
a student walks 180 m in 150seconds. the student stops for 40 seconds and then walks 210m farther in 2 minutes. what is the average speed of the entire walk?
Expert's answer
V_av = S_total / T_total
V_av - the average speed
S_total - the total distance
T_total - the total time
S_total = 180 m + 210 m = 390 m
T_total = 150 seconds + 40 seconds + 2 minutes = 150 seconds + 40 seconds + 120 seconds& = 310 seconds
V_av = 390 m / 310 seconds = 1.258 m/sec
V_av - the average speed
S_total - the total distance
T_total - the total time
S_total = 180 m + 210 m = 390 m
T_total = 150 seconds + 40 seconds + 2 minutes = 150 seconds + 40 seconds + 120 seconds& = 310 seconds
V_av = 390 m / 310 seconds = 1.258 m/sec
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