The bus, which weighs 12 tons at full load, starts to move with an acceleration of 1.2

| September 21, 2021 | education

The bus, which weighs 12 tons at full load, starts to move with an acceleration of 1.2 m / s2. Find the pulling force if the drag coefficient is 0.02.

To find out the thrust force of the engine of the specified bus, we will project the known forces onto the horizontal axis: Ft – F – Ftr = 0, whence we express: Ft = F + Ftr = m * a + μ * N = m * a – μ * m * g = (a + μ * g) * m.

Const: q – acceleration due to gravity (approx. Q ≈ 10 m / s2).

Data: a – acceleration of the specified bus (a = 1.2 m / s2); μ – coefficient. resistance to movement (μ = 0.02); m is the mass of the bus (m = 12 t = 12 * 10 ^ 3 kg).

Let’s perform the calculation: Ft = (a + μ * g) * m = (1.2 + 0.02 * 10) * 12 * 10 ^ 3 = 16.8 * 10 ^ 3 N.

Answer: The thrust force of the engine of the specified bus must be 16.8 kN.



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