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elena55 [62]
3 years ago
10

The elevators in the Landmark Tower in Yokohama, Japan are among the fastest in the world. After starting from rest, they reach

a maximum speed of 120 meters per minute. It takes the elevator 4.0 seconds to reach maximum speed. What is its acceleration in m/s/s (meters per second per second)?
Physics
1 answer:
MariettaO [177]3 years ago
3 0

Answer:

The acceleration is 30 m/s²

Explanation:

Given that,

Maximum speed = 120 m/s

Time = 4.0 sec

We need to calculate the acceleration

Using equation of motion

v=u+at

Where, v = speed

u = initial speed

a = acceleration

t = time

Put the value into the formula

120=0+a\times4.0

a=\dfrac{120}{4.0}

a=30\ m/s^2

Hence, The acceleration is 30 m/s²

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Explanation:

The given data is as follows.

      m_{1} = 0.8 kg/s = 800 g,      C_{1} = 4.18 J/g^{o}C

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Now, according to the law of conservation of energy,

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          T = \frac{325.3}{7.52}

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Thus, we can conclude that temperature of the warm water stream is 43.23^{o}C.

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