apowers6361
05.10.2020 •
Physics
You walk 60 meters a speed 3m/s and then 140 meters a speed 7m/s along a straight track.Find your avarage speed
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Ответ:
α = -π/3 rad/s², θ = 1.5π rad = 0.75 rev
Explanation:
ω₀ = 30 rev/min(2π rad/rev / 60 s/min) = π rad/s
α = (ω₁ - ω₀)/t = (0 - π)/3 = -π/3 rad/s²
θ = (ω₁² - ω₀²) / 2α = (0² - π²) / 2(-π/3) = 3π/2 rad
3π/2 rad / 2π rad/rev = 0.75 rev