Question 348407
{{{v(t)=ds/dt=-70sin(t)}}}
{{{a(t)=dv/dt=-70cos(t)}}}
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{{{v(pi/4)=-70sin(pi/4)=-70(0.7071)=49.5}}} {{{units/sec}}}
{{{a(pi/4)=-70cod(pi/4)=-70(0.7071)=49.5}}} {{{units/sec^2}}}