A π/2 rad
B -π/2 rad
C 0 rad
D π/6 rad
A x = 10cos(4πt + π/2) cm
B x = 5cos(8πt - π/2) cm.
C x = 10cos(8πt +π/2) cm
D x = 20cos(8πt - π/2) cm.
A x = 8cos(20πt + 3π/4) cm.
B x = 4cos(20πt - 3π/4) cm.
C x = 8cos(10πt + 3π/4) cm.
D x = 4cos(20πt + 2π/3) cm.
A x = 5cos(πt + π) cm
B x = 10cos(πt) cm
C x = 10cos(πt + π) cm
D x = 5cos(πt) cm
A π rad/s
B 2π rad/s
C 3π rad/s
D 4π rad/s
A 3cos(10t - π/2) cm
B 5cos(10t - π/2) cm
C 5cos(10t + π/2) cm
D 3cos(10t + π/2) cm
A 2 cm
B 3 cm
C 4 cm
D 5 cm
A x = 8cos(4πt - 2π/3) cm
B x = 4cos(4πt - 2π/3) cm
C x = 4cos(4πt + 2π/3) cm
D x = 16cos(4πt - 2π/3) cm
A x = 5cos(πt + π) cm
B x = 5cos(πt + π/2) cm
C x = 5cos(πt + π/3) cm
D x = 5cos(πt)cm
A x = 5cos(4πt + π/2) cm
B x = 5cos(4t + π/2) cm
C x = 10cos(4πt + π/2) cm
D x = 10cos(4t + π/2) cm
A x = 5cos(5πt - π/2) cm
B x = 8cos(5πt - π/2) cm
C x = 5cos(5πt + π/2) cm
D x = 4cos(5πt - π/2) cm
A x = 2cos(10t + π/2) cm
B x = 10cos(2t - π/2) cm
C x = 10cos(2t + π/4) cm
D x = 10cos(2t) cm
A x = 4cos(πt + π/2) cm
B x = 4cos(2πt - π/2) cm
C x = 4cos(πt - π/2) cm
D x = 4cos(2πt + π/2) cm
A 4cos(2πt +π/6) cm
B 4cos(2πt - 5π/6) cm
C 4cos(2πt - π/6) cm
D 4cos(2πt + 5π/6) cm
A x = Acos()
B x = Asin()
C x = Acos
D x = Asin
A x = Acos(t + π/4 )
B x = A cos(t - π/2)
C x = Acos(t + π/2 )
D x = A cos(t)
A acos(πt - π/3 )
B 2acos(πt - π/6 )
C 2acos(πt+ 5π/6 )
D acos(πt + 5π/6 )
A 5cos (120πt +π/3) cm
B 5cos(120πt -π/2) cm
C 5 cos(120πt + π/2) cm
D 5cos(120πt -π/3) cm
A x= 10sin4πt
B x = 10cos4πt
C x = 10cos2πt
D 10sin2πt
A x = 5sin(πt + π/2) cm
B x = sin4 πt cm
C x = sin2 πt cm
D 5cos(4 πt - π/2) cm
A x = 4cos(2 πt - π/6) cm
B x = 8cos(πt + π/3)cm
C x = 4cos(2 πt - π/3)cm
D x = 8cos(πt + π/6) cm
A x = 4cos(πt + π/2)cm
B x = 4 sin(2 πt - π/2)cm
C x = 4 sin(2 πt + π/2)cm
D x = 4cos(πt - π/2)cm
A x = 4cos(5t - π/2)(cm).
B x = 4cos(5 πt)(cm).
C x = 4cos(5t + π )(cm).
D x = 2cos5t(cm).
A = 0,1cos(5t- π/2) (rad).
B = 0,1sin(5t + π) (rad).
C = 0,1sin(t/5-π)(rad).
D = 0,1sin(t/5 + π)(rad).
A s = 5sin(t/2 - π/2 )(cm).
B s = 5sin(t/2 + π/2)(cm).
C s = 5sin( 2t - π/2)(cm).
D s = 5sin( 2t + π/2)(cm).
A s = 2√2 cos(7t - π/2)cm.
B s = 2√2 cos(7πt + π/2)cm.
C s = 2√2 cos(7t + π/2)cm.
D s = 2cos(7t + π/2)cm.
A v2 = mgl(cos – cosm).
B v2 = 2mgl(cos – cosm).
C v2 = 2gl(cos – cosm).
D v2 = mgl(cosm – cos).
A π/2 rad
B -π/2 rad
C 0 rad
D π/6 rad
A x = 10cos(4πt + π/2) cm
B x = 5cos(8πt - π/2) cm.
C x = 10cos(8πt +π/2) cm
D x = 20cos(8πt - π/2) cm.
A x = 8cos(20πt + 3π/4) cm.
B x = 4cos(20πt - 3π/4) cm.
C x = 8cos(10πt + 3π/4) cm.
D x = 4cos(20πt + 2π/3) cm.
A x = 5cos(πt + π) cm
B x = 10cos(πt) cm
C x = 10cos(πt + π) cm
D x = 5cos(πt) cm
A π rad/s
B 2π rad/s
C 3π rad/s
D 4π rad/s
A 3cos(10t - π/2) cm
B 5cos(10t - π/2) cm
C 5cos(10t + π/2) cm
D 3cos(10t + π/2) cm
A 2 cm
B 3 cm
C 4 cm
D 5 cm
A x = 8cos(4πt - 2π/3) cm
B x = 4cos(4πt - 2π/3) cm
C x = 4cos(4πt + 2π/3) cm
D x = 16cos(4πt - 2π/3) cm
A x = 5cos(πt + π) cm
B x = 5cos(πt + π/2) cm
C x = 5cos(πt + π/3) cm
D x = 5cos(πt)cm
A x = 5cos(4πt + π/2) cm
B x = 5cos(4t + π/2) cm
C x = 10cos(4πt + π/2) cm
D x = 10cos(4t + π/2) cm
A x = 5cos(5πt - π/2) cm
B x = 8cos(5πt - π/2) cm
C x = 5cos(5πt + π/2) cm
D x = 4cos(5πt - π/2) cm
A x = 2cos(10t + π/2) cm
B x = 10cos(2t - π/2) cm
C x = 10cos(2t + π/4) cm
D x = 10cos(2t) cm
A x = 4cos(πt + π/2) cm
B x = 4cos(2πt - π/2) cm
C x = 4cos(πt - π/2) cm
D x = 4cos(2πt + π/2) cm
A 4cos(2πt +π/6) cm
B 4cos(2πt - 5π/6) cm
C 4cos(2πt - π/6) cm
D 4cos(2πt + 5π/6) cm
A x = Acos()
B x = Asin()
C x = Acos
D x = Asin
A x = Acos(t + π/4 )
B x = A cos(t - π/2)
C x = Acos(t + π/2 )
D x = A cos(t)
A acos(πt - π/3 )
B 2acos(πt - π/6 )
C 2acos(πt+ 5π/6 )
D acos(πt + 5π/6 )
A 5cos (120πt +π/3) cm
B 5cos(120πt -π/2) cm
C 5 cos(120πt + π/2) cm
D 5cos(120πt -π/3) cm
A x= 10sin4πt
B x = 10cos4πt
C x = 10cos2πt
D 10sin2πt
A x = 5sin(πt + π/2) cm
B x = sin4 πt cm
C x = sin2 πt cm
D 5cos(4 πt - π/2) cm
A x = 4cos(2 πt - π/6) cm
B x = 8cos(πt + π/3)cm
C x = 4cos(2 πt - π/3)cm
D x = 8cos(πt + π/6) cm
A x = 4cos(πt + π/2)cm
B x = 4 sin(2 πt - π/2)cm
C x = 4 sin(2 πt + π/2)cm
D x = 4cos(πt - π/2)cm
A x = 4cos(5t - π/2)(cm).
B x = 4cos(5 πt)(cm).
C x = 4cos(5t + π )(cm).
D x = 2cos5t(cm).
A = 0,1cos(5t- π/2) (rad).
B = 0,1sin(5t + π) (rad).
C = 0,1sin(t/5-π)(rad).
D = 0,1sin(t/5 + π)(rad).
A s = 5sin(t/2 - π/2 )(cm).
B s = 5sin(t/2 + π/2)(cm).
C s = 5sin( 2t - π/2)(cm).
D s = 5sin( 2t + π/2)(cm).
A s = 2√2 cos(7t - π/2)cm.
B s = 2√2 cos(7πt + π/2)cm.
C s = 2√2 cos(7t + π/2)cm.
D s = 2cos(7t + π/2)cm.
A v2 = mgl(cos – cosm).
B v2 = 2mgl(cos – cosm).
C v2 = 2gl(cos – cosm).
D v2 = mgl(cosm – cos).
A 10Hz và -π/6 rad .
B 1/10Hz và π/6 rad.
C 1/10Hz và –π/6 rad.
D 10Hz và π/6 rad.
A x = 4cos(20πt + 0,5π) cm
B x = 4cos(20πt - 0,5π) cm
C x = 4cos(20πt) cm
D x = 4cos(20πt + π) cm
A x = 4cos(10 π t – π/2) cm.
B x = 4cos(10t + π/2) cm.
C x = 8cos(10 π t + π/2) cm.
D x = 8cos(10t – π/2) cm.
A 4cm; π rad
B 4cm; π/2 rad
C 4cm; -π/2 rad
D 4cm; o rad
A x=6cos(πt+π/2)(cm)
B x=6cos(2πt-π/2)(cm)
C x=6cos(2πt+π/2)(cm)
D x=6cos(πt-π/2)(cm).
A x = 5cos(20t - ) (cm)
B x = 10cos(40πt +) (cm)
C x = 5cos(40πt -) (cm)
D x = 10cos(20t +) (cm)
A x = 5cos(2πt – π/2) (cm)
B x = 5cos(2πt + π/2) (cm)
C x = 5cos(πt – π/2) (cm)
D x = 5cos(2πt + π/2) (cm)
A x = 10cos(8πt) cm.
B x = 10cos(4t + π/2) cm.
C x = 10cos(πt/2) cm.
D x = 4cos(10t) cm.
A \(x = 3\sqrt 2 cos(10t + \frac{{3\pi }}{4})cm\)
B \(x = 3cos(10t - \frac{{3\pi }}{4})cm\)
C \(x = 3\sqrt 2 cos(10t - \frac{{3\pi }}{4})cm\)
D \(x = 3\sqrt 2 cos(10t - \frac{\pi }{4})cm\)
A x = 6,5cos(5πt) (cm)
B x = 4cos(5πt) (cm)
C x = 4cos(20t) (cm)
D x = 6,5cos(20t) (cm)
A x=8cos(10t-π/3) (cm)
B x=8cos(10t-π/6) (cm)
C x=8cos(10t+π/3) (cm)
D x=8cos(10t+π/6) (cm)
A Lúc chất điểm qua vị trí cân bằng theo chiều dương qui ước.
B Lúc chất điểm có li độ x = - A.
C Lúc chất điểm có li độ x = + A.
D Lúc chất điểm qua vị trí cân bằng theo chiều âm qui ước.
A x = 2cos(20t + π/2) cm
B x = 2cos(20πt + π/2) cm
C x = 2cos(20t) cm
D x = 2cos(20t + π) cm
A chất điểm đi qua vị trí cân bằng theo chiều dương trục toạ độ.
B chất điểm ở vị trí có li độ x = -A.
C chất điểm đi qua vị trí cân bằng ngược chiều dương trục toạ độ.
D chất điểm ở vị trí có li độ x = +A.
A A. x=10cos(50πt-π/3) cm
B x=10cos(100πt-2π/3) cm
C x=10cos(100πt+π/3) cm
D x=10cos(50πt-2π/3) cm
A x = 6 cos (10t – 1,91) cm.
B x = 6 cos (10t + 1,91) cm.
C x = 5 cos (10t – 1,71) cm.
D x = 5 cos (10t + 1,71) cm.
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