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Súradnice polohy telesa sú dané: x = 4t, y = 3t. Akú rýchlosť má teleso v časovom okamihu t1 = 2 s?
v1 = 14 m/s
v1 = 5 m/s
v1 = 7 m/s
v1 = 1 m/s
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