Question

определите, какую скорость развивает велосипедист за время, равное 20с, двигаясь из состояния покоя с ускорением 0,2 м-с в квадрате.

Answer 1

"двигаясь из состояния покоя", тоесть начальная скорость = 0.
  V( типо скорость:D) = 0+ 20*0.2 = 4 м/с (по формуле, скорость= начальная + (ускорение * время) )
не знаю, может и не так.

Answer 2

Calculation of the Speed of a Cyclist

To determine the speed of a cyclist, we need to use the equation of motion that relates speed, time, and acceleration. The equation is as follows:

v = u + at

Where: - v is the final velocity (speed) of the cyclist, - u is the initial velocity (which is zero in this case, as the cyclist starts from rest), - a is the acceleration of the cyclist, and - t is the time taken.

In this case, the acceleration is given as 0.2 m/s², and the time is 20 seconds. Plugging these values into the equation, we can calculate the speed of the cyclist.

v = 0 + (0.2 m/s²)(20 s)

Simplifying the equation:

v = 4 m/s

Therefore, the cyclist develops a speed of 4 m/s after 20 seconds of moving from a state of rest with an acceleration of 0.2 m/s².