Question

автомобиль массой 2000 кг, трогается с места и через 5 секунд развивает скорость 10м/с, сила трения 1000Н. Найти силу тяги

Answer 1

m=2000кг
V0=0м/с
V=10м/с
t=5с
Fтр=1000Н
Fтяги=
?------------
a=(V-V0)/t
a=(10-0)/5a=2м/с^2
F=ma
ma=Fтяги-Fтр
2*2000=Fтяги-1000
Fтяги=5000Н
Ответ: Fтяги = 5000Н (5кН)

Answer 2

Calculation of Traction Force

To find the traction force, we need to consider the forces acting on the car. In this case, we have the force of friction opposing the motion and the force of traction propelling the car forward.

The given information is as follows: - Mass of the car: 2000 kg - Time taken to reach a speed of 10 m/s: 5 seconds - Force of friction: 1000 N

To calculate the traction force, we can use Newton's second law of motion, which states that the net force acting on an object is equal to the product of its mass and acceleration.

The acceleration of the car can be calculated using the formula: acceleration = (final velocity - initial velocity) / time

In this case, the initial velocity is 0 m/s, the final velocity is 10 m/s, and the time is 5 seconds. Plugging these values into the formula, we get: acceleration = (10 m/s - 0 m/s) / 5 s = 2 m/s^2

Now, we can calculate the traction force using the formula: traction force = mass * acceleration

Plugging in the values, we get: traction force = 2000 kg * 2 m/s^2 = 4000 N

Therefore, the traction force required to accelerate the car from rest to a speed of 10 m/s in 5 seconds, considering a force of friction of 1000 N, is 4000 N.

Please note that the provided search results did not directly answer the question. The calculation was done using the principles of Newton's second law of motion.