Question

a bicyclist steadily speeds up from rest to 9m/s. determine all unknowns. |v₀| = 0 m/s |̄v| = 9 m/s |v_f| = 9 m/s

Explanation:

Step1: Identify initial velocity

From rest, so $v_0 = 0$ m/s (given as correct green box).

Step2: Identify final velocity

Speeds up to 9 m/s, so $v_f = 9$ m/s (given as correct green box).

Step3: Calculate average velocity

Average velocity $\bar{v} = \frac{v_0 + v_f}{2} = \frac{0 + 9}{2} = 4.5$ m/s.

Answer:

$\bar{v} = 4.5$ m/s, $v_0 = 0$ m/s, $v_f = 9$ m/s