- #1

- 47

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## Homework Statement

A block, attached to a spring, is set into vertical oscillation with an amplitude of 25.0 cm and a frequency of 5.00 Hz. At t = 0.00 s, the block is 14.0 cm below the equilibrium position and is moving upwards. Assume that the displacement from equilibrium is given by

y = ym cos(ω t + φ ) , with y positive upwards.

Calculate the phase angle, φ.

(a) 5.31 rad

(b) 0.976 rad

(c) 4.12 rad

(d) 2.17 rad

(e) 1.87 rad

the answer is c....

## Homework Equations

ive been using the equation that was given to me in the question, using 0.14m as my y, 0.25m as my ym, 0 as my t therefore w isnt needed? and i have a frequency??? im lost....please help lol

i am arriving at (b).....if this helps at all