A body weighing 1 kg, thrown vertically upward at a speed of 15 m / s, fell to the ground at a speed of 10 m / s. Define work to overcome air resistance.
To find the work done by an abandoned body to overcome air resistance, we use the formula: Asopr = ΔEk = m * (Vn ^ 2 – Vk ^ 2) / 2.
The values of the variables: m is the mass of the thrown body (m = 1 kg); Vн – throw speed (Vн = 15 m / s); Vк – landing speed (Vк = 10 m / s).
Calculation: Asopr = m * (Vn ^ 2 – Vk ^ 2) / 2 = 1 * (15 ^ 2 – 10 ^ 2) / 2 = 62.5 J.
Answer: To overcome the air resistance, the thrown body performed work of 62.5 J.
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