Question

A 450g mass on a spring is oscillating at 1.2Hz. The totalenergy of the oscillation is 0.51J. What is the amplitude.

Answer 1

Answer:

A=0.199

Explanation:

We are given that  

Mass of spring=m=450 g=$=\frac{450}{1000}=0.45 kg$

Where 1 kg=1000 g

Frequency of oscillation=$\nu=1.2Hz$

Total energy of the oscillation=0.51 J

We have to find the amplitude of oscillations.

Energy of oscillator=$E=\frac{1}{2}m\omega^2A^2$

Where $\omega=2\pi\nu$=Angular frequency

A=Amplitude

$\pi=\frac{22}{7}$

Using the formula

$0.51=\frac{1}{2}\times 0.45(2\times \frac{22}{7}\times 1.2)^2A^2$

$A^2=\frac{2\times 0.51}{0.45\times (2\times \frac{22}{7}\times 1.2)^2}=0.0398$

$A=\sqrt{0.0398}=0.199$

Hence, the amplitude of oscillation=A=0.199