Question

Автобус массой 15 тон трогается с места под воздействием силы тяги 15КН. Чему равно ускорение автобуса, если действующая на него сила сопротивления равна 4,5КН ???

Answer 1

2-й закон Ньютона:

ma = Fт - Fс

ускорение

а = (Fт - Fс):m = (15 - 4,5)·10³ : 15·10³ = 0,7(м/с²)

 

Answer 2

Дано:

m=15т=15000кг

Fтяги=15кН=15000Н

Fc=4,5кН=4500Н

а-?

Решение:

Fтяги=F1-Fc

F1=ma

15000=19500a

a=0,7

Ответ:0,7м/c^2

 

Answer 3

Calculation of Acceleration

To calculate the acceleration of the bus, we can use Newton's second law of motion, which states that the acceleration of an object is equal to the net force acting on it divided by its mass. The formula for acceleration is:

Acceleration = Net Force / Mass

In this case, the net force acting on the bus is the difference between the force of traction and the force of resistance. The force of traction is given as 15 kN, and the force of resistance is given as 4.5 kN.

Substituting the values into the formula, we get:

Acceleration = (Force of Traction - Force of Resistance) / Mass

Acceleration = (15 kN - 4.5 kN) / 15 t

Now, let's convert the forces and mass to the appropriate units:

1 ton = 1000 kg 1 kN = 1000 N

Acceleration = (15,000 N - 4,500 N) / 15,000 kg

Simplifying the equation:

Acceleration = 10,500 N / 15,000 kg

Calculating the acceleration:

Acceleration = 0.7 m/s^2

Therefore, the acceleration of the bus is 0.7 m/s^2.

Please note that the above calculation assumes that the forces are constant and there are no other external factors affecting the motion of the bus.