- #1
Masri
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Homework Statement
x = 0.20m*sin(0.44 rad/s * t)
Write the equation for the velocity of this object. Find the velocity at t = 4:0 s.
Homework Equations
The Attempt at a Solution
well, i know that v(t)= - wAsin(wt +[tex]\phi[/tex])
and we know the w = 0.44 rad/s
A = 0.20 s
t=4
so it i plugged the numbers in but the answer came wrong..
and the answer in the book says ...
v= 0.088 m/s* cos ( 0.44 rad/s * 4 s)
v= - 1.7 *10-2 m/s
well first where did he get that equation from ? 2nd if we actually calculated (v= 0.088 m/s* cos ( 0.44 rad/s * 4 s) ) it won't give us v= - 1.7 *10-2 m/s
so if somone could please help me out with this one... any help would be appreciated ,
Thanks!