Question

Тело массой 2 кг движется под действием некоторой силы.Закон изменения скорости тела имеет вид:Uх=0,2t.Какова сила,действующая на тело?Расспишите пожалуйста

Answer 1

F=ma
m=2кг
a из уравнения изменения скорости=0,2.
F=2*0,2=0,4Н

Answer 2

Calculating the Force Acting on the Body

To calculate the force acting on the body, we can use the equation of motion, which relates force, mass, and acceleration. The equation of motion is given by:

F = ma

Where: - F is the force acting on the body - m is the mass of the body - a is the acceleration of the body

Finding the Acceleration of the Body

The given law of change of velocity (motion) is in the form Ux = 0.2t. This represents the velocity of the body in the x-direction as a function of time.

To find the acceleration, we need to differentiate the velocity with respect to time. The derivative of velocity with respect to time gives us the acceleration.

Ux = 0.2t

Differentiating with respect to time: a = dUx/dt = 0.2

So, the acceleration of the body is 0.2 m/s^2.

Calculating the Force

Now that we have the acceleration, we can use the equation of motion to calculate the force acting on the body.

F = ma

Given: - m = 2 kg (mass of the body) - a = 0.2 m/s^2 (acceleration of the body)

Substituting the values: F = 2 kg * 0.2 m/s^2 = 0.4 N

Therefore, the force acting on the body is 0.4 Newtons.