How long does it take a car to change its velocity from 15m/s to 25m/s if it accelerate uniformly at 5m/s
We can use the formula:
\(v = u + at\)
Rearranging the formula to solve for time:
\(t = \frac{{v - u}}{a}\)
where
\(v = 25 \, \text{m/s}\) (final velocity),
\(u = 15 \, \text{m/s}\) (initial velocity), and
\(a = 5 \, \text{m/s}^2\) (acceleration).
Plugging in the values, we have:
\(t = \frac{{25 - 15}}{5}\)
\(t = \frac{10}{5}\)
\(t = 2 \, \text{s}\)
So, it takes 2 seconds for the car to change its velocity from 15 m/s to 25 m/s.