A body weighing 10 kg was lifted to a height of 2 m, determine the work of gravity.

To find the work done by gravity when lifting a given body, we use the formula: At = Ft * S * cosα = m * g * h * cosα.

Constant and variable values: m is the mass of the lifted body (m = 10 kg); g – acceleration due to gravity (g ≈ 10 m / s2); h – height (h = 2 m); α is the angle between the vector of gravity and the displacement of the body during lifting (α = 180º).

Calculation: Am = m * g * h * cosα = 10 * 10 * 2 * (-1) = -200 J.

Answer: The work of gravity is -200 J.