Question

How long does it take to accelerate a car from a speed of 50 kilometers per hour to a speed of 100 kilometers per hour at an acceleration of 1 metre per second square?

Answer 1

Answer:

Time taken = 14s

Explanation:

Given that,

Initial velocity = u = 50 km/hr = 50 * 5/18 = 250/18 m/s

Final velocity = v = 100 km/hr = 100 * 5/18 = 500/18 m/s

Acceleration = 1 m/s²

We know that,

$\boxed{v = u + at}$

(500/18) = (250/18) + (1 × t)

500/18 - 250/18 = t

t = 250/18 s

t = 13.89 s

t ≈ 14s