- Viết phương trình dao động điều hòa - Đề 1

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 = 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 – cos_m).

B v² = 2mgl(cos – cos_m).

C v² = 2gl(cos – cos_m).           

D v² = mgl(cos_m – cos).

A π/2 rad

B -π/2 rad

C 0 rad

D π/6 rad

A 2 cm 

B 3 cm       

C 4 cm 

D 5 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 v² = mgl(cos – cos_m).

B v² = 2mgl(cos – cos_m).

C v² = 2gl(cos – cos_m).           

D v² = mgl(cos_m – cos).

A Vật dao động với biên độ A.

B Vật dao động với pha ban đầu \(\frac{\pi }{4}rad\).

C Vật dao động với tần số góc ω.

D Vật dao động với pha ban đầu \( - \frac{\pi }{4}rad\).

A \(10Hz;-\frac{\pi }{6}\text{ }rad~~\)

B \(\frac{1}{10}Hz;\frac{\pi }{6}\text{ }rad~\)

C \(\frac{1}{10}Hz;-\frac{\pi }{6}\text{ }rad~\)

D \(10Hz;\frac{\pi }{6}\text{ }rad~~\)

A \(\frac{\pi }{3}rad\)

B \( - \frac{\pi }{6}rad\)

C \( - \frac{{2\pi }}{3}rad\)

D \(\frac{{2\pi }}{3}rad\)

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 \(x = 4cos\left( {10\pi t--\frac{\pi }{2}} \right){\rm{ }}cm\)

B \(x = 4cos\left( {10t + \frac{\pi }{2}} \right){\rm{ }}cm\)

C \(x = 8cos\left( {10\pi t + \frac{\pi }{2}} \right){\rm{ }}cm\)

D \(x = 8cos\left( {10t - \frac{\pi }{2}} \right){\rm{ }}cm\)

A \(4cm;\pi \,\,rad~~~~~~~~~\)

B \(4cm;\frac{\pi }{2}rad~~~~~~~~~\)

C \(4cm;-\frac{\pi }{2}rad~~~~~~~~~\)

D \(4cm;0\,\,\,rad~~~~~~~~~\)

A \(x = 6cos\left( {\pi t + \frac{\pi }{2}} \right)\left( {cm} \right)\)

B \(x = 6cos\left( {2\pi t - \frac{\pi }{2}} \right)\left( {cm} \right)\)

C \(x = 6cos\left( {2\pi t + \frac{\pi }{2}} \right)\left( {cm} \right)\)

D \(x = 6cos\left( {\pi t - \frac{\pi }{2}} \right)\left( {cm} \right)\)

A \(x = 5cos\left( {20t - \frac{\pi }{2}} \right){\rm{ }}\left( {cm} \right)\)

B \(x = 10cos\left( {40\pi t + \frac{\pi }{2}} \right){\rm{ }}\left( {cm} \right)\)

C \(x = 5cos\left( {40\pi t - \frac{\pi }{2}} \right){\rm{ }}\left( {cm} \right)\)

D \(x = 10cos\left( {20t + \frac{\pi }{2}} \right){\rm{ }}\left( {cm} \right)\)

A \({\rm{x}} = 16c{\rm{os}}\left( {2\pi t - \frac{\pi }{2}} \right)(cm)\)

B \({\rm{x}} = 16c{\rm{os}}\left( {2\pi t + \frac{\pi }{2}} \right)(cm)\)

C \({\rm{x}} = 8c{\rm{os}}\left( {2\pi t + \frac{\pi }{2}} \right)(cm)\)

D \({\rm{x}} = 8c{\rm{os}}\left( {2\pi t - \frac{\pi }{2}} \right)(cm)\)

A \(x=4cos\left( 20\pi t+\frac{\pi }{2} \right)cm~~~\)

B \(x=4cos\left( 20\pi t-\frac{\pi }{2} \right)cm~~~\)

C \(x=4cos\left( 20\pi t \right)cm~~~\)

D \(x=4cos\left( 20\pi t+\pi  \right)cm~~~\)

A \(x = 3\sqrt 2 \cos \left( {10t + \frac{{3\pi }}{4}} \right)cm\)

B \(x = 3\cos \left( {10t - \frac{{3\pi }}{4}} \right)cm\)

C \(x = 3\sqrt 2 \cos \left( {10t - \frac{{3\pi }}{4}} \right)cm\)

D \(x = 3\sqrt 2 \cos \left( {10t - \frac{\pi }{4}} \right)cm\)

A \(x = 10\cos \left( {\frac{{11\pi }}{6}t + \frac{{2\pi }}{3}} \right)cm\)

B \(x = 10\cos \left( {\frac{{11\pi }}{6}t - \frac{{2\pi }}{3}} \right)cm\)

C \(x = 10\cos \left( {2\pi t + \frac{\pi }{3}} \right)cm\)

D \(x = 10\cos \left( {\frac{{5\pi }}{6}t - \frac{\pi }{3}} \right)cm\)

A \(~\alpha =0,1.\cos \left( 5t-\frac{\pi }{2} \right)\,rad\)

B \(~\alpha =0,01.\cos \left( 5t-\frac{\pi }{2} \right)\,rad\)

C \(~\alpha =0,1.\cos \left( \frac{t}{5}-\frac{\pi }{2} \right)\,rad\)

D \(~\alpha =0,01.\cos \left( \frac{t}{5}+\frac{\pi }{2} \right)\,rad\)

A \(x = 10\sin (2\pi t + \frac{\pi }{4})\) cm

B \(x = 5\sqrt 2 \cos (\pi t - \frac{{3\pi }}{4})\) cm

C \(x = 10\sin (2\pi t - \frac{\pi }{4})\) cm

D \(x = 10\cos (2\pi t + \frac{{3\pi }}{4})\) cm

A \(x = 2cos\left( {20t + \frac{\pi }{2}} \right){\rm{ }}cm\)

B \(x=2cos\left( 20t-\frac{\pi }{2} \right)\text{ }cm\)

C \(x=2cos\left( 20t \right)\text{ }cm\)

D \(x = 2cos\left( {20t + \pi } \right){\rm{ }}cm\)

A 14,5 m/s²

B 0,57 m/s²

C 5,7 m/s²

D 1,45 m/s²

A \(x = 6,5cos\left( {5\pi t} \right){\rm{ }}\left( {cm} \right)\)

B \(x = 4cos\left( {5\pi t} \right){\rm{ }}\left( {cm} \right)\)

C \(x=4cos\left( 20t \right)\text{ }\left( cm \right)~~~~~~\)

D \(x = 6,5cos\left( {20t} \right){\rm{ }}\left( {cm} \right)\)