Question

Трактор начинает тащить стоящую телегу массой 4,5т с постоянной скоростью 8000 Н. с каким ускорением движется телега? за какой промежуток времени телега проедет 420м. коэффициент трения качения колес о землю 0,05

Answer 1

F-f≡ma→F-kmg≡ma
8000-0.05*4500*10≡4500*a
a≈1.28m/c²
S≡at²/2
t≈25.6sec

Answer 2

Calculation of Acceleration:

To calculate the acceleration of the wagon, 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 (F = m * a).

In this case, the force acting on the wagon is the force exerted by the tractor, which is 8000 N. The mass of the wagon is given as 4.5 tons, which is equivalent to 4500 kg.

Using the formula F = m * a, we can rearrange it to solve for acceleration (a):

a = F / m

Substituting the given values, we get:

a = 8000 N / 4500 kg

Now, let's calculate the acceleration.