Question

Мотоциклист при торможении с ускорением 0,4 м/с останавливается через 10 с после начала торможения. Ка­кую скорость имел мотоциклист в момент начала торможе­ния?

Answer 1

V = V0 - a*t  | конечная скорость = 0 , то-бишь , v = 0.
Отсюда V0 = a*t = 0,4 м\с * 10 с = 4 м\с . 

Answer 2

4 км . Вроде бы так .

Answer 3

Calculating Initial Speed of the Motorcyclist

To calculate the initial speed of the motorcyclist, we can use the following kinematic equation:

v = u + at

Where: - v = final velocity (0 m/s, as the motorcyclist stops) - u = initial velocity (unknown) - a = acceleration (-0.4 m/s^2, as the motorcyclist is decelerating) - t = time taken (10 s)

Calculation

Using the given values: - v = 0 m/s - a = -0.4 m/s^2 - t = 10 s

We can rearrange the equation to solve for u:

u = v - at

Substituting the values: u = 0 - (-0.4 * 10) u = 0 + 4 u = 4 m/s

So, the motorcyclist had an initial speed of 4 m/s at the moment of beginning to brake.

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