Question

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)?

Answer 1

The acceleration is 30 m/s²

Step-by-step 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*4.0`

`a=(120)/(4.0)`

`a=30\ m/s^2`

Hence, The acceleration is 30 m/s²