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Lorico [155]
3 years ago
9

If a train starts from rest and after 0.5 hours travels at a speed of 75 km/hr, what is its

Physics
1 answer:
Ksju [112]3 years ago
6 0

Answer:

150 km/hr²

Explanation:

The data for the motion of the train includes;

The train starts from rest, therefore, the initial velocity of the train, u = 0 km/hr

The speed of the train after 0.5 hours, v = 75 km/hr

The change in time during the motion of the train, Δt = 0.5 hours

The acceleration, 'a', is the rate of change of velocity with time;

a = \dfrac{\Delta v}{\Delta t} = \dfrac{v - u}{\Delta t}

Therefore, we have;

a = (75 km/hr - 0 km/hr)/(0.5 hr) = 150 km/hr²

a = 150 km/hr² = 150 km/hr² × 1,000 m/km × hr²/(3,600 s)² = 5/432 m/s²

The acceleration of the train, a = 150 km/hr² = 5/432 m/s².

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