Simple Pendulum Homework: Amplitude of 25 cm/s Push

[trusean]

Homework Statement

A pendulum consists of a 500 g bob at the end of a massless 75 cm rod.
(a) While it is hanging vertically down, the bob is given a push that starts it moving at 25
cm/s. What is the amplitude of the resulting oscillation in degrees? You may neglect
damping.

Homework Equations

The Attempt at a Solution

 

[malty]

Homework Statement

A pendulum consists of a 500 g bob at the end of a massless 75 cm rod.
(a) While it is hanging vertically down, the bob is given a push that starts it moving at 25
cm/s. What is the amplitude of the resulting oscillation in degrees? You may neglect
damping.

Homework Equations

The Attempt at a Solution

Okays, first off an attempt is at least required before we can help you, and most importantly without the attempt we can see what you're doing wrong, or what you may have misunderstood.