A body exhibits simple oscillatory motion. If the amplitude is 6.2m and crests at the beginning of oscillation and is 1.6 radians per second then...

1.

A body exhibits simple oscillatory motion. If the amplitude is 6.2m and crests at the beginning of oscillation and ω is 1.6 radians per second then identify the body's displacement after 3.5 seconds.

2.

The speed of sound is 343m/s. A police car moving at 34m/s sounds a 1,400Hz siren on a windless day. what is the frequency perceived by a stationary pedestrian by the roadside as the police car passes