The bus speed increases from 10 to 20 m / s. What is the work of the resultant of all the forces acting

The bus speed increases from 10 to 20 m / s. What is the work of the resultant of all the forces acting on the passenger of a bus weighing 80 kg?

To find the desired work of the resultant of all forces, we will use the formula: A = ΔEk = m * (V ^ 2 – V0 ^ 2) / 2.

The values of the variables: m is the mass of the bus passenger (m = 80 kg); V is the final speed of the bus (V = 20 m / s); V0 – initial speed (V0 = 10 m / s).

Let’s perform the calculation: A = m * (V ^ 2 – V0 ^ 2) / 2 = 80 * (20 ^ 2 – 10 ^ 2) / 2 = 12 * 10 ^ 3 J = 12 kJ.

Answer: The sought work of the resultant of all forces is 12 kJ.