A helicopter travelling horizontally at 50.0 m/s West turns steadily, so that after 45.0 s, its velocity is
35.0 m/s South. Calculate the average acceleration of
the helicopter

to be honest as much as i would love to answer this. i feel as if something's missing. just saying.

graph question answered .. you think better when you are relaxed and happy

the motion of a pendulum is a classic example of mechanical energy conservation. a pendulum consists of a mass (known as a bob ) attached by a string to a pivot point. as the pendulum moves it sweeps out a circular arc, moving back and forth in a periodic fashion.