4 years ago

Help me please this test is due today!

Physics

2 answers:

aleksley [76]4 years ago

7 0

Answer:

v = 80.48 km/h.

Explanation:

We have,

Acceleration of a train is 2 km/h/s or 7200 km/h²

Initial velocity of a train is 20 km/h

It is required to find the velocity after 30 seconds or 0.0084 h

Let v is the final speed. Using equation of kinematics as :

$v=u+at\\\\v=20+7200\times 0.0084\\\\v=80.48\ km/h$

So, the final speed of the train is 80.48 km/h.

Zinaida [17]4 years ago

7 0

Answer:

Explanation:

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