The body moves to a rough area, a friction force of 5H begins to act on it. After passing 5m, the body
| June 21, 2021 | education
The body moves to a rough area, a friction force of 5H begins to act on it. After passing 5m, the body stops. What is the work of the friction force equal to?
To calculate the work performed by the friction force on a rough area, we apply the formula: A = Ftr * S * cosα.
Variables: Ftr – friction force (Ftr = 5 N); S is the distance traveled by the body over a rough area (S = 5 m); α – angle between displacement and friction force vector (α = 180º).
Calculation: A = Ftr * S * cosα = 5 * 5 * cos 180º = -25 J.
Answer: The work of the friction force on a rough area is -25 J.
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