Lusi goes to school riding a motorcycle. At first the speed is 72 km / hour. After approaching the school the income is reduced by 18 km / h with a time of 5 seconds. How much is the average slowdown that has been broken?
Answers
Known "
Vo = 72 km / h = 72,000 m / 3600 s = 20 m / s
Vt = 18 km / h = 18,000 m / 3600 s = 5 m / s
t = 5 s
Asked: The average slowdown was done
Settlement:
a = (Vt - Vo) /s
a = (5 m / s - 20 m / s) / 5s
a = - 15 m / s / 5s
a = - 3 m / s ^ 2
If minus, then what happens is slowdown with an average of 3 m/s^2
Mapel = Mathematics
Class = IX Middle School
Material = Motion and Style
Keywords = deceleration
Answer:
Step-by-step explanation:
Vo = 72 km / h = 72,000 m / 3600 s = 20 m / s
Vt = 18 km / h = 18,000 m / 3600 s = 5 m / s
t = 5 s
Asked: The average slowdown was done
Settlement:
a = (Vt - Vo) /s
a = (5 m / s - 20 m / s) / 5s
a = - 15 m / s / 5s
a = - 3 m / s ^ 2
If minus, then what happens is slowdown with an average of 3 m/s^2
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