jamesjarrell67
03.12.2021 •
Physics
2) An object is thrown vertically upwards. Which of the following graphs represents the motion of
the object?
(a)
(b)
v
v
t
(c)
(d)
V
v
t
t
Solved
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Ответ:
c) F = 16000 N
Explanation:
For this exercise we use Newton's second law
F = ma
they tell us that adding the other wagons the acceleration of the locomotive must be maintained
F = m a
by adding the other four wagons
mass = 4 no
therefore to maintain the force you must also raise the same factor
Fe = 4Fo
Fe = 4 4000
F = 16000 N