Question

The figure shown a triangular pulse on a rope at t =0. It is approaching a fixed end at 2 cm/s. The particle speed on the leading edge at the instant depicted is _______.

• A. 1cm/s
• B. 2cm/s
• C. 3cm/s
• D. 6cm/s

Answer 1

The correct option is B 2cm/s

Since the particle at the leading edge does not have any velocity in the upward direction at the given instant, its only velocity is the velocity of the whole pulse which is $2cm/s$ towards the end.