Physics

Problem

Questions 28-30 The following pairs of equations show how the

x

- and

y

-coordinates of a particle vary with time

t

. In the equations,

A, B

, and

\omega

are nonzero constants. Choose the pair of equations that best answers each of the following questions. A choice may be used once, more than once, or not at all. A)

x=A \cos \omega t

y=A \sin \omega t

(B)

x=A \cos \omega t

y=2 A \sin \omega t

(C)

x=A t

y=B t

(D)

x=A t^{2}

y=B t^{2}

(E)

x=A t

y=B t^{2}

30. Which pair of equations can describe the path of a particle that moves with a constant speed and with a nonzero acceleration that is constant in magnitude? A)

x=A \cos \omega t

y=A \sin \omega t

(B)

x=A \cos \omega t

y=2 A \sin \omega t

(C)

x=A t

y=B t

(D)

x=A t^{2}

y=B t^{2}

(E)

x=A t

y=B t^{2}

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