F=ma
a=F/m
a=2000/1000
a=2 m/s^2
<span>Pitch and frequency are more or less the same thing - high pitch = high frequency.
The freqency of vibration of a string f = 1/length (L) so as length decreases the frequency increases.</span>
Density = 7.36 grams ÷ (2 cm × 2 cm × 2cm) = 0.92 g/cm^3