Question

Напишите уравнение зависимости скорости от времени и определите скорость материальной точки в момент времени t=2с. a) v=t; 2 м/с; b) v=t; 1,5 м/с; c) v=2t; 2 м/с; d) среди ответов 1-3 нет верного.

Answer 1

Ответ: с
Уравнение скорости имеет вид: v=v0+at

Answer 2

Equation of Motion and Determining Velocity at t=2s

The equation of motion that describes the relationship between velocity and time for a material point is crucial in understanding the velocity at a specific time.

The given options for the equation of velocity as a function of time are: a) v = t; 2 m/s b) v = t; 1.5 m/s c) v = 2t; 2 m/s d) None of the answers 1-3 is correct.

Let's analyze each option:

a) v = t; 2 m/s b) v = t; 1.5 m/s c) v = 2t; 2 m/s d) None of the answers 1-3 is correct.

Now, let's cite the relevant search snippets to verify the correct equation of motion and determine the velocity at t=2s.

According to Source the equation of motion is given by v = at + v0, where v is the final velocity, a is the acceleration, t is the time, and v0 is the initial velocity.

From Source the equation of motion is represented as v = bt; b = 0.5. This equation indicates that the velocity is directly proportional to time with a constant of proportionality b.

Based on the provided equations and the given options, it can be inferred that the correct equation for the velocity as a function of time is v = bt, where b is a constant.

Now, to determine the velocity at t=2s, we can use the equation v = bt. Given that b = 0.5, we can calculate the velocity at t=2s:

v = 0.5 * 2 = 1 m/s

Therefore, the correct option is: b) v = t; 1.5 m/s