chathcox0309 chathcox0309

24-03-2024
Physics

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A boy throws a ball of mass 0.35 kg straight upward with an initial speed of 25 m/s. When the ball returns to the boy, its speed is 20 m/s. how mych work does air resistance do

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MathPhys MathPhys

25-03-2024

Answer:

39.4 J

Explanation:

Work = change in energy

W = ΔKE

W = ½ m (v² – v₀²)

W = ½ (0.35 kg) ((25 m/s)² – (20 m/s)²)

W = 39.4 J

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