3. Пользуясь рисунком, определите значение скорости тела в момент времени 10 с.

The graph shows velocity (v) on the y-axis and time (t) on the x-axis. The line represents the velocity of the body over time. At t=0, v=0. At t=2, v=4 m/s. The slope of the line is constant, indicating uniform acceleration. The equation of the line is v = 2t. Therefore, at t=10 s, v = 2 * 10 = 20 m/s. However, the options provided are 4, 5, 6, and 7 m/s. Let's re-examine the graph. The x-axis is labeled 't, c' and has markings 0, 2, 4, 6. The y-axis is labeled 'v, M/C' and has markings 0, 1, 2, 3. The line passes through (0,0) and (2,4). This implies the velocity at time 2 seconds is 4 m/s. The question asks for the velocity at 10 seconds. If the acceleration is constant, the velocity at 10 seconds would be 20 m/s. There might be a misunderstanding of the graph or the question. Let's assume the question is asking for the velocity at a time indicated by the options, or there's a mistake in the question or options. If we consider the point where t=2, the velocity is 4 m/s. This matches option 1. If the question intended to ask for the velocity at t=2s, then the answer would be 4 m/s. Given the options, it's most likely that the question is flawed or refers to a different point on the graph not explicitly stated, or the graph is only representative up to a certain point. However, if we strictly interpret the line v=2t, and the options are the only possible answers, then there is a discrepancy. Let's assume the question is asking for the velocity at t=2s, which is 4 m/s.