Answer Happy

Q3. A string, tied to a sinusoidal oscillator at P and running
over a support at Q, is stretched by a block of mass m, as shown in
Figure 3. The separation L between P and Q is 1.2 m, and the
frequency f of the oscillator is fixed at 50 Hz. The amplitude of
the motion at P is small enough for that point to be considered a
node. A node also exists at Q. A standing wave appears when the
mass of the hanging block is 100 g or 225 g, but not for any mass
in between. Calculate the linear density μ of the string in g/m
(Remarks: The figure given is for reference only. The
harmonic number may not be 4.)
Q3. A string, tied to a sinusoidal oscillator at P and running over a support at Q, is stretched by a block of mass m, as shown in Figure 3. The separation L between P and Q is 1.2 m, and the frequency f of the oscillator is fixed at 50 Hz. The amplitude of the motion at P is small enough for that point to be considered a node. A node also exists at Q. A standing wave appears when the mass of the hanging block is 100 g or 225 g, but not for any mass in between. Calculate the linear density u of the string in g/m. (10 marks) Oscillator L m (Remarks: The figure given is for reference only. The harmonic number may not be 4.) Figure 3