Starting from rest, a train travels with a constant acceleration of 2.0 m/s^2 for half a minute. Subsequently, the brakes are applied, bringing the train to rest in one minute. Determine the maximum speed attained by

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Quantrex Academy · Accepted Answer

Correct answer: C. 60

The train starts from rest, so initial velocity

u = 0

.

The acceleration is

a = 2.0 \text{ m/s}^2

for a time

t = 0.5 \text{ min} = 30 \text{ s}

.

The maximum speed is reached at the end of the acceleration phase.

Using the equation of kinematics

v = u + at

:

v = 0 + 2.0 \times 30 = 60 \text{ m/s}

Starting from rest, a train travels with a constant acceleration of...

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