Every 10.0 seconds, a crest of the wave passes the pier. This means that the period of the wave is exactly 10.0 s:
which means that the frequency of the wave is
The wavelength of a wave is related to its frequency by the relationship
where v is the speed of the wave.
In this problem, v=5.6 m/s; if we use the previous formula, we find the wavelength of the wave:
Answer:
a = 1.34 m/s²
Explanation:
given,
mass of the attendant(M) = 75 Kg
mass of cart (m)= 27 Kg
Backward force exerted on floor (F)= 155 N
frictional force on the cart (f)= 18 N
acceleration
F_{net} = F - frictional force
F_{net} = 155 N - 18 N
F_{net} = 137 N
now,
a = 1.34 m/s²
the acceleration produced when flight attendant is equal to a = 1.34 m/s²
The momentum of an object is the product between the mass m of the object and its velocity:
The truck in our problem has momentum equal to
and a mass of
so, if we re-arrange the previous formula, we can use these data to find the velocity of the truck:
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