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End of chapter exercises

A heavy rope is flicked upwards, creating a single pulse in the rope. Make a drawing of the rope and indicate the following in your drawing:

  1. The direction of motion of the pulse

  2. Amplitude

  3. Pulse length

  4. Position of rest

A pulse has a speed of 2,5 m·s−1. How far will it have travelled in 6 s?

distance=speed×time
=(2,5ms-1)×(6s)
=15m

A pulse covers a distance of 75 cm in 2,5 s. What is the speed of the pulse?

speed=distancetime
=75cm2,5s
=30cms-1=0,30ms-1

How long does it take a pulse to cover a distance of 200 mm if its speed is 4 m·s−1?

speed=distancetime
time=distancespeed
=200mm4ms-1
=0,2m4ms-1
=0,05s