Physics

Physics

Problem

The motion of a particle is described by

x(t)=0.04\cos(4\pi t)

, with

x

in metres and

t

in seconds. The magnitude of its acceleration at

t=\tfrac{1}{12}\,\text{s}

is a)

6.3\,\text{m/s}^2

b)

1.6\,\text{m/s}^2

c)

3.2\,\text{m/s}^2

d)

4.5\,\text{m/s}^2

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