The bus, moving away, moves with a constant acceleration of 1.5 m / s. How long will it take for

The bus, moving away, moves with a constant acceleration of 1.5 m / s. How long will it take for it to reach a speed of 54 km / h?

Based on the conditions, the initial speed of the bus was zero. Then it is necessary to divide the final speed by the given acceleration. Let’s convert the speed from km / h to m / s.

54 km / h = 54 * 1000 m / 3600 s.

54 km / h = 15 m / s.

Let the speed V = 15 m / s, and the acceleration a = 1.5 m / s2.

Then the time is t = V / a. Substitute the values of the quantities and calculate.

t = 15 m / s / 1.5 m / s2.

t = 10 s.

Answer: 10 s.