Question

ПОМОГИТЕ СРОЧНО!!! Автомобиль массой 3000 кг трогается с места и проходит путь 100 м за 20 с. Определить силу тяги автомобиля

Answer 1

Дано:
m=3000кг
S=100м
t=20с
v₀=0м/с
Найти:
F=?
Решение:
F=ma
S=v₀t+at²/2     , т.к.  v₀=0м/с, то  слагаемое   v₀t=0 м
S=at²/2   ⇒  а=2S/t² = (2·100м)/ (20с)²= 200м/400с²=0,5м/с²
F=3000кг·0,5м/c²=1500Н
Ответ: 1500Н

Answer 2

Calculation of the Traction Force of the Car

To determine the traction force of the car, we can use Newton's second law of motion, which states that the force acting on an object is equal to the mass of the object multiplied by its acceleration. In this case, the car is initially at rest and then accelerates to a certain speed.

Given: - Mass of the car = 3000 kg - Distance traveled = 100 m - Time taken = 20 s

To find the acceleration of the car, we can use the formula:

Acceleration (a) = (Final velocity - Initial velocity) / Time taken

Since the car starts from rest, the initial velocity is 0. The final velocity can be calculated using the formula:

Final velocity (v) = Distance traveled / Time taken

Substituting the values, we can find the acceleration and then calculate the traction force using Newton's second law.

Let's calculate the values step by step:

1. Calculate the final velocity: - Distance traveled = 100 m - Time taken = 20 s

Final velocity (v) = 100 m / 20 s = 5 m/s

2. Calculate the acceleration: - Initial velocity = 0 m/s - Final velocity = 5 m/s - Time taken = 20 s

Acceleration (a) = (5 m/s - 0 m/s) / 20 s = 0.25 m/s^2

3. Calculate the traction force: - Mass of the car = 3000 kg - Acceleration = 0.25 m/s^2

Traction force = Mass * Acceleration = 3000 kg * 0.25 m/s^2 = 750 N

Therefore, the traction force of the car is 750 Newtons.

Please note that the calculations provided above are based on the given information and assumptions.