Дано:
а_m = 48 см/с²
υ_m = 12 см/с
А - ?
x = x_m*sin(ωt + φ)
x_m = A
υ = x' = (x_m*sin(ωt + φ))' = (x_m)' * (sin(ωt + φ))' = 0 + x_m*cos(ωt + φ)*(ωt + φ)' = x_m*ω*cos(ωt + φ)
υ_m = x_m*ω = A*ω
a = υ' = (x_m*ω*cos(ωt + φ))' = (x_m * ω)' * (cos(ωt + φ)' = 0 + x_m*ω * (-sin(ωt + φ)*(ωt + φ)' = x_m*ω*ω*(-sin(ωt + φ)) = x_m*ω²*(-sin(ωt + φ))
a_m = x_m*ω² = A*ω²
υ_m = Aω => ω = υ_m/A
a_m = Aω² = A*(υ_m/A)² = A*υ_m²/A² = υ_m²/A
A = υ_m²/a_m = 12²/48 = 12*12/(12*4) = 12/4 = 3 см
ответ: 3 см.
Дано:
а_m = 48 см/с²
υ_m = 12 см/с
А - ?
x = x_m*sin(ωt + φ)
x_m = A
υ = x' = (x_m*sin(ωt + φ))' = (x_m)' * (sin(ωt + φ))' = 0 + x_m*cos(ωt + φ)*(ωt + φ)' = x_m*ω*cos(ωt + φ)
x_m = A
υ_m = x_m*ω = A*ω
a = υ' = (x_m*ω*cos(ωt + φ))' = (x_m * ω)' * (cos(ωt + φ)' = 0 + x_m*ω * (-sin(ωt + φ)*(ωt + φ)' = x_m*ω*ω*(-sin(ωt + φ)) = x_m*ω²*(-sin(ωt + φ))
a_m = x_m*ω² = A*ω²
υ_m = Aω => ω = υ_m/A
a_m = Aω² = A*(υ_m/A)² = A*υ_m²/A² = υ_m²/A
A = υ_m²/a_m = 12²/48 = 12*12/(12*4) = 12/4 = 3 см
ответ: 3 см.