Question

A small piece of cork in a ripple tank oscillates up and down as ripples pass it. If the ripples travelling at 0.3 m/s have a wavelength of 1.5 p cm and the cork vibrates with an amplitude of 5 mm, the maximum velocity of the cork is –

• A. 20 cm/sec
• B. 20 m/sec
• C. 0.02 m/sec
• D. 200 cm/sec

Answer 1

Answer: (A)

20 cm/sec

Answer 2

Maximum velocity of the cork

= wA = 2pnA = 2p$\left( \frac{v}{\lambda} \right)$A

= 2p ×$\frac{0.3 \times 100}{1.5\pi}$ × 0.5 = 20 cm/sec