Question

a student throws a heavy ball downward off the top of a building with a speed of 15m/s. the ball reaches a speed of 44m/s just before striking the ground. assume the speed changes steadily.
determine all unknowns.
|v₀| = m/s
|v̄| = m/s
|v_f| = m/s

Explanation:

Step1: Identify initial speed

Initial speed \(|v_o|\) is given as 15 m/s.

Step2: Calculate average speed

Average speed \(|\bar{v}| = \frac{|v_o| + |v_f|}{2} = \frac{15 + 44}{2}\).

Step3: Identify final speed

Final speed \(|v_f|\) is given as 44 m/s.

Answer:

\(|v_o| = 15\) m/s
\(|\bar{v}| = 29.5\) m/s
\(|v_f| = 44\) m/s