The equation describing the position of an object undergoing simple harmonic motion is $x = ( 5.0 \mathrm {~cm} ) \cos ( 10 \pi t - \pi / 2 )$ , where t is in seconds. The velocity of the object at t = 0.20 seconds is
A) zero.
B) 13 cm/s.
C)-5.0 cm/s.
D) -160 cm/s.

Question

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The Answer of The equation describing the position of an object undergoing simple harmonic motion is $x = ( 5.0 \mathrm {~cm} ) \cos ( 10 \pi t - \pi / 2 )$ , where t is in seconds. The velocity of the object at t = 0.20 seconds is
A) zero.
B) 13 cm/s.
C)-5.0 cm/s.
D) -160 cm/s.

The Equation Describing the Position of an Object Undergoing Simple x=(5.0 cm)cos⁡(10πt−π/2)x = ( 5.0 \mathrm {~cm} ) \cos ( 10 \pi t - \pi / 2 )x=(5.0 cm)cos(10πt−π/2)

The Equation Describing the Position of an Object Undergoing Simple $x = ( 5.0 \mathrm {~cm} ) \cos ( 10 \pi t - \pi / 2 )$