The new thrill ride accelerates from rest

Question

The new thrill ride accelerates from rest to 65ms^-1(146mph) with an acceleration of 36.5ms^-2. How much time does it take? Give your answer to an appropriate number of significant figures.

Answer 1

We can use the kinematic equation V=V₀ + (a*t) where V is the final velocity, V₀ is the initial velocity, a is acceleration, and t is time in seconds.

Rearranging this we get (V-V₀) / a = t.

Plugging in values we find that t = (65 - 0) / 36.5 = 65 / 36.5 = 1.8 seconds.